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[SCM] gawk branch, feature/cmp_scalars, updated. gawk-4.1.0-4177-geabd0e
|
From: |
Arnold Robbins |
|
Subject: |
[SCM] gawk branch, feature/cmp_scalars, updated. gawk-4.1.0-4177-geabd0e4 |
|
Date: |
Sun, 15 Nov 2020 23:15:58 -0500 (EST) |
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The branch, feature/cmp_scalars has been updated
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via 476b183d4f70a098aae0943a16ead5b59ffe6e4b (commit)
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- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=eabd0e4c1a72da3d164d0c0a8c335d583c6f698d
commit eabd0e4c1a72da3d164d0c0a8c335d583c6f698d
Merge: 6d1274d 476b183
Author: Arnold D. Robbins <arnold@skeeve.com>
Date: Mon Nov 16 06:15:50 2020 +0200
Merge branch 'master' into feature/cmp_scalars
diff --cc doc/ChangeLog
index bf89490,6dad4af..8d00228
--- a/doc/ChangeLog
+++ b/doc/ChangeLog
@@@ -1,18 -1,8 +1,29 @@@
+ 2020-11-16 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawktexi.in (Nextfile Statement): Clarify what happens in
+ a BEGINFILE rule.
+
+2020-11-15 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawktexi.in (Strange values): Add test programs inside
+ @ignore; extracted to example directory.
+
+2020-11-09 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawktexi.in: Samll improvement in strange numbers section.
+
+2020-11-04 Arnold D. Robbins <arnold@skeeve.com>
+
+ * gawktexi.in (Strange values): New section on NaN and infinity.
+ Update some other bits to point to it.
+ * wordlist: Updated with more words.
+
++2020-11-16 Arnold D. Robbins <arnold@skeeve.com>
++
++ * gawktexi.in (Nextfile Statement): Clarify what happens in
++ a BEGINFILE rule.
++>>>>>>> master
++
2020-10-31 Arnold D. Robbins <arnold@skeeve.com>
* texinfo.tex: Updated from GNULIB.
diff --cc doc/gawk.info
index 244bbd8,909cf29..ebae71b
--- a/doc/gawk.info
+++ b/doc/gawk.info
@@@ -24421,58 -24432,6 +24421,64 @@@ representations yield an unexpected res
-| 4
+File: gawk.info, Node: Strange values, Prev: Errors accumulate, Up:
Inexactness of computations
+
+16.4.1.4 Floating Point Values They Didn't Talk About In School
+...............................................................
+
+Both IEEE 754 floating-point hardware, and MPFR, support two kinds of
+values that you probably didn't learn about in school. The first is
+"infinity", a special value, that can be either negative or positive,
+and which is either smaller than any other value (negative infinity), or
+larger than any other value (positive infinity). When such values are
+generated, 'gawk' prints them as either '-inf' or '+inf', respectively.
+It accepts those strings as data input and converts them to the proper
+floating-point values internally.
+
+ Infinity values of the same sign compare as equal to each other.
+Otherwise, operations (addition, subtraction, etc.) involving another
+number and infinity produce infinity.
+
+ The second kind of value is "not a number", or NaN for short.(1)
+This is a special value that results from attempting a calculation that
+has no answer as a real number. In such a case, programs can either
+receive a floating-point exception, or get NaN back as the result. The
+IEEE 754 standard recommends that systems return NaN. Some examples:
+
+'sqrt(-1)'
+ This makes sense in the range of complex numbers, but not in the
+ range of real numbers, so the result is NaN.
+
+'log(-8)'
+ -8 is out of the domain of 'log()', so the result is NaN.
+
+ NaN values are strange. In particular, they cannot be compared with
+other floating point values; any such comparison, except for "is not
+equal to", returns false. NaN values are so much unequal to other
+values that even comparing two identical NaN values with '!=' returns
+true!
+
+ NaN values can also be signed, although it depends upon the
+implementation as to which sign you get for any operation that returns a
+NaN. For example, on some systems, 'sqrt(-1)' returns a negative NaN. On
+others, it returns a positive NaN.
+
+ When such values are generated, 'gawk' prints them as either '-nan'
+or '+nan', respectively. Here too, 'gawk' accepts those strings as data
+input and converts them to the proper floating-point values internally.
+
++ If you want to dive more deeply into this topic, you can find test
++programs in C, 'awk' and Python in the directory
++'awklib/eg/test-programs' in the 'gawk' distribution. These programs
++enable comparison among programming languages as to how they hanle NaN
++and infinity values.
++
+ ---------- Footnotes ----------
+
+ (1) Thanks to Michael Brennan for this description, which we have
+paraphrased, and for the examples.
+
+
File: gawk.info, Node: Getting Accuracy, Next: Try To Round, Prev:
Inexactness of computations, Up: FP Math Caution
16.4.2 Getting the Accuracy You Need
@@@ -37975,603 -37934,602 +37981,603 @@@ Inde
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-Node: Getting1218730
-Node: Extracting1219693
-Node: Distribution contents1221331
-Node: Unix Installation1227811
-Node: Quick Installation1228493
-Node: Shell Startup Files1230907
-Node: Additional Configuration Options1231996
-Node: Configuration Philosophy1234311
-Node: Non-Unix Installation1236680
-Node: PC Installation1237140
-Node: PC Binary Installation1237978
-Node: PC Compiling1238413
-Node: PC Using1239530
-Node: Cygwin1243083
-Node: MSYS1244307
-Node: VMS Installation1244909
-Node: VMS Compilation1245700
-Ref: VMS Compilation-Footnote-11246929
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-Node: VMS Installation Details1248672
-Node: VMS Running1250925
-Node: VMS GNV1255204
-Node: VMS Old Gawk1255939
-Node: Bugs1256410
-Node: Bug address1257073
-Node: Usenet1260055
-Node: Maintainers1261059
-Node: Other Versions1262244
-Node: Installation summary1269332
-Node: Notes1270541
-Node: Compatibility Mode1271335
-Node: Additions1272117
-Node: Accessing The Source1273042
-Node: Adding Code1274479
-Node: New Ports1280698
-Node: Derived Files1285073
-Ref: Derived Files-Footnote-11290733
-Ref: Derived Files-Footnote-21290768
-Ref: Derived Files-Footnote-31291366
-Node: Future Extensions1291480
-Node: Implementation Limitations1292138
-Node: Extension Design1293348
-Node: Old Extension Problems1294492
-Ref: Old Extension Problems-Footnote-11296010
-Node: Extension New Mechanism Goals1296067
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-Node: Notes summary1302339
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-Ref: figure-process-flow1305145
-Ref: Basic High Level-Footnote-11308446
-Node: Basic Data Typing1308631
-Node: Glossary1311959
-Node: Copying1343844
-Node: GNU Free Documentation License1381387
-Node: Index1406507
+Node: Foreword344553
+Node: Foreword448995
+Node: Preface50527
+Ref: Preface-Footnote-153386
+Ref: Preface-Footnote-253495
+Ref: Preface-Footnote-353729
+Node: History53871
+Node: Names56223
+Ref: Names-Footnote-157327
+Node: This Manual57474
+Ref: This Manual-Footnote-164113
+Node: Conventions64213
+Node: Manual History66582
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+Node: How To Contribute69694
+Node: Acknowledgments70620
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+Node: Running gawk77996
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+Node: Read Terminal80449
+Node: Long82442
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+Node: Records203183
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+Node: Fields214303
+Node: Nonconstant Fields217044
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+Node: Single Character Fields232684
+Node: Command Line Field Separator233744
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+Node: Fields with fixed data246739
+Node: Splitting By Content248257
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+Node: More CSV252203
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+Node: Locale influences conversions365816
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- Ref: table-sub-escapes574252
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- Ref: Bitwise Functions-Footnote-2606897
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- Ref: Library Names-Footnote-2655279
- Node: General Functions655365
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- Ref: Ordinal Functions-Footnote-2668687
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- Node: Getlocaltime Function670867
- Node: Readfile Function674609
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- Node: Filetrans Function678619
- Node: Rewind Function682715
- Node: File Checking684624
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- Node: Getopt Function689688
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- Node: Extension Sample File Functions1144935
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- Node: Language History1176179
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- Node: SVR41179987
- Node: POSIX1181421
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- Node: Distribution contents1223418
- Node: Unix Installation1229898
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- Node: Shell Startup Files1232994
- Node: Additional Configuration Options1234083
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- Node: PC Installation1239227
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- Node: Cygwin1245170
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- Node: Basic Data Typing1310718
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- Node: Copying1345931
- Node: GNU Free Documentation License1383474
- Node: Index1408594
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++Node: User-modified467608
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++Ref: Numeric Functions-Footnote-2547523
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++Ref: String Functions-Footnote-1571984
++Ref: String Functions-Footnote-2572112
++Ref: String Functions-Footnote-3572360
++Node: Gory Details572447
++Ref: table-sub-escapes574238
++Ref: table-sub-proposed575757
++Ref: table-posix-sub577120
++Ref: table-gensub-escapes578661
++Ref: Gory Details-Footnote-1579484
++Node: I/O Functions579638
++Ref: table-system-return-values586092
++Ref: I/O Functions-Footnote-1588172
++Ref: I/O Functions-Footnote-2588320
++Node: Time Functions588440
++Ref: Time Functions-Footnote-1599111
++Ref: Time Functions-Footnote-2599179
++Ref: Time Functions-Footnote-3599337
++Ref: Time Functions-Footnote-4599448
++Ref: Time Functions-Footnote-5599560
++Ref: Time Functions-Footnote-6599787
++Node: Bitwise Functions600053
++Ref: table-bitwise-ops600647
++Ref: Bitwise Functions-Footnote-1606710
++Ref: Bitwise Functions-Footnote-2606883
++Node: Type Functions607074
++Node: I18N Functions609937
++Node: User-defined611588
++Node: Definition Syntax612400
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++Node: Function Example618165
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++Node: Function Calling621109
++Node: Calling A Function621697
++Node: Variable Scope622655
++Node: Pass By Value/Reference625649
++Node: Function Caveats628293
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++Node: Return Statement630460
++Node: Dynamic Typing633439
++Node: Indirect Calls634369
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++Node: Functions Summary644749
++Node: Library Functions647454
++Ref: Library Functions-Footnote-1651061
++Ref: Library Functions-Footnote-2651204
++Node: Library Names651375
++Ref: Library Names-Footnote-1655042
++Ref: Library Names-Footnote-2655265
++Node: General Functions655351
++Node: Strtonum Function656454
++Node: Assert Function659476
++Node: Round Function662802
++Node: Cliff Random Function664342
++Node: Ordinal Functions665358
++Ref: Ordinal Functions-Footnote-1668421
++Ref: Ordinal Functions-Footnote-2668673
++Node: Join Function668883
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++Node: Getlocaltime Function670853
++Node: Readfile Function674595
++Node: Shell Quoting676572
++Node: Data File Management677973
++Node: Filetrans Function678605
++Node: Rewind Function682701
++Node: File Checking684610
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++Node: Empty Files686145
++Node: Ignoring Assigns688124
++Node: Getopt Function689674
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++Node: Passwd Functions705085
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++Node: Group Functions714012
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++Node: Walking Arrays722117
++Node: Library Functions Summary725125
++Node: Library Exercises726531
++Node: Sample Programs726996
++Node: Running Examples727766
++Node: Clones728494
++Node: Cut Program729718
++Node: Egrep Program739647
++Node: Id Program748658
++Node: Split Program758605
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++Node: Tee Program768552
++Node: Uniq Program771342
++Node: Wc Program778906
++Node: Bytes vs. Characters779303
++Node: Using extensions780851
++Node: wc program781609
++Node: Miscellaneous Programs786474
++Node: Dupword Program787687
++Node: Alarm Program789717
++Node: Translate Program794572
++Ref: Translate Program-Footnote-1799137
++Node: Labels Program799407
++Ref: Labels Program-Footnote-1802758
++Node: Word Sorting802842
++Node: History Sorting806914
++Node: Extract Program809139
++Node: Simple Sed817193
++Node: Igawk Program820267
++Ref: Igawk Program-Footnote-1834598
++Ref: Igawk Program-Footnote-2834800
++Ref: Igawk Program-Footnote-3834922
++Node: Anagram Program835037
++Node: Signature Program838099
++Node: Programs Summary839346
++Node: Programs Exercises840560
++Ref: Programs Exercises-Footnote-1844690
++Node: Advanced Features844776
++Node: Nondecimal Data846766
++Node: Array Sorting848357
++Node: Controlling Array Traversal849057
++Ref: Controlling Array Traversal-Footnote-1857425
++Node: Array Sorting Functions857543
++Ref: Array Sorting Functions-Footnote-1862634
++Node: Two-way I/O862830
++Ref: Two-way I/O-Footnote-1870551
++Ref: Two-way I/O-Footnote-2870738
++Node: TCP/IP Networking870820
++Node: Profiling873938
++Node: Advanced Features Summary883252
++Node: Internationalization885096
++Node: I18N and L10N886576
++Node: Explaining gettext887263
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++Node: Programmer i18n893505
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++Node: String Extraction899297
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++Node: Printf Ordering900515
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++Node: I18N Portability903365
++Ref: I18N Portability-Footnote-1905821
++Node: I18N Example905884
++Ref: I18N Example-Footnote-1909159
++Ref: I18N Example-Footnote-2909232
++Node: Gawk I18N909341
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++Node: Debugger911331
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++Node: Sample Debugging Session918233
++Node: Debugger Invocation918767
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++Node: Debugger Info940194
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++Node: Readline Support949327
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++Node: Namespace Example962809
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++Node: Arbitrary Precision Arithmetic968283
++Node: Computer Arithmetic969770
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++Node: Math Definitions974744
++Ref: table-ieee-formats977720
++Node: MPFR features978287
++Node: FP Math Caution980005
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++Node: Inexactness of computations981446
++Node: Inexact representation982477
++Node: Comparing FP Values983837
++Node: Errors accumulate985078
++Node: Strange values986534
++Ref: Strange values-Footnote-1989096
++Node: Getting Accuracy989201
++Node: Try To Round991911
++Node: Setting precision992810
++Ref: table-predefined-precision-strings993507
++Node: Setting the rounding mode995337
++Ref: table-gawk-rounding-modes995711
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++Node: Checking for MPFR1003145
++Node: POSIX Floating Point Problems1004619
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++Node: Floating point summary1008942
++Node: Dynamic Extensions1011132
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++Node: Extension API Description1019906
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++Ref: table-value-types-returned1076245
++Node: Accessing Parameters1077181
++Node: Symbol Table Access1078418
++Node: Symbol table by name1078930
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++Node: Cached values1086331
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++Ref: gawk-api-version1114112
++Node: Extension GMP/MPFR Versioning1115843
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++Node: Extension Samples1143674
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++Node: Extension Sample Readdir1160019
++Ref: table-readdir-file-types1160908
++Node: Extension Sample Revout1161975
++Node: Extension Sample Rev2way1162564
++Node: Extension Sample Read write array1163304
++Node: Extension Sample Readfile1165246
++Node: Extension Sample Time1166341
++Node: Extension Sample API Tests1168093
++Node: gawkextlib1168585
++Node: Extension summary1171503
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++Node: Language History1176447
++Node: V7/SVR3.11178103
++Node: SVR41180255
++Node: POSIX1181689
++Node: BTL1183070
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++Node: Common Extensions1205896
++Node: Ranges and Locales1207179
++Ref: Ranges and Locales-Footnote-11211795
++Ref: Ranges and Locales-Footnote-21211822
++Ref: Ranges and Locales-Footnote-31212057
++Node: Contributors1212280
++Node: History summary1218277
++Node: Installation1219657
++Node: Gawk Distribution1220601
++Node: Getting1221085
++Node: Extracting1222048
++Node: Distribution contents1223686
++Node: Unix Installation1230166
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++Node: Additional Configuration Options1234351
++Node: Configuration Philosophy1236666
++Node: Non-Unix Installation1239035
++Node: PC Installation1239495
++Node: PC Binary Installation1240333
++Node: PC Compiling1240768
++Node: PC Using1241885
++Node: Cygwin1245438
++Node: MSYS1246662
++Node: VMS Installation1247264
++Node: VMS Compilation1248055
++Ref: VMS Compilation-Footnote-11249284
++Node: VMS Dynamic Extensions1249342
++Node: VMS Installation Details1251027
++Node: VMS Running1253280
++Node: VMS GNV1257559
++Node: VMS Old Gawk1258294
++Node: Bugs1258765
++Node: Bug address1259428
++Node: Usenet1262410
++Node: Maintainers1263414
++Node: Other Versions1264599
++Node: Installation summary1271687
++Node: Notes1272896
++Node: Compatibility Mode1273690
++Node: Additions1274472
++Node: Accessing The Source1275397
++Node: Adding Code1276834
++Node: New Ports1283053
++Node: Derived Files1287428
++Ref: Derived Files-Footnote-11293088
++Ref: Derived Files-Footnote-21293123
++Ref: Derived Files-Footnote-31293721
++Node: Future Extensions1293835
++Node: Implementation Limitations1294493
++Node: Extension Design1295703
++Node: Old Extension Problems1296847
++Ref: Old Extension Problems-Footnote-11298365
++Node: Extension New Mechanism Goals1298422
++Ref: Extension New Mechanism Goals-Footnote-11301786
++Node: Extension Other Design Decisions1301975
++Node: Extension Future Growth1304088
++Node: Notes summary1304694
++Node: Basic Concepts1305852
++Node: Basic High Level1306533
++Ref: figure-general-flow1306815
++Ref: figure-process-flow1307500
++Ref: Basic High Level-Footnote-11310801
++Node: Basic Data Typing1310986
++Node: Glossary1314314
++Node: Copying1346199
++Node: GNU Free Documentation License1383742
++Node: Index1408862
End Tag Table
-----------------------------------------------------------------------
Summary of changes:
build-aux/ChangeLog | 4 +
build-aux/config.guess | 186 ++++++------
build-aux/config.sub | 40 +--
build-aux/install-sh | 35 ++-
doc/ChangeLog | 11 +
doc/gawk.info | 784 +++++++++++++++++++++++++------------------------
doc/gawk.texi | 2 +-
doc/gawktexi.in | 2 +-
8 files changed, 556 insertions(+), 508 deletions(-)
hooks/post-receive
--
gawk
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Arnold Robbins <=