gawk manual porting problem with POSIX 1003.1-2001 "sort"

[Paul Eggert]

The gawk manual uses some obsolete shell syntax for "sort" that has
been withdrawn in POSIX 1003.1-2001.  (My test version of "sort"
issues a warning for the obsolete syntax.)  Here is a patch.

2002-02-10  Paul Eggert  <address@hidden>

        * gawk.texi (Word Sorting): Don't use sort +1, as POSIX 1003.1-2001
        no longer allows it.  Use sort -k instead.

--- gawk.texi   2001/05/27 20:02:49     3.0.98.3
+++ gawk.texi   2002/02/10 08:55:20     3.0.98.4
@@ -19793,7 +19793,7 @@ Assuming we have saved this program in a
 and that the data is in @file{file1}, the following pipeline:
 
 @example
-awk -f wordfreq.awk file1 | sort +1 -nr
+awk -f wordfreq.awk file1 | sort -k 2nr
 @end example
 
 @noindent
@@ -19814,7 +19814,7 @@ the @code{END} action to:
 @example
 @c file eg/prog/wordfreq.awk
 END @{
-    sort = "sort +1 -nr"
+    sort = "sort -k 2nr"
     for (word in freq)
         printf "%s\t%d\n", word, freq[word] | sort
     close(sort)