doc: clarify -fsyntax-error

[Akim Demaille]

commit 33b246a624abc4c5fbfac485133c32a04130b74b
Author: Akim Demaille <address@hidden>
Date:   Fri Apr 26 16:30:11 2019 +0200

    doc: clarify -fsyntax-error
    
    * NEWS, doc/bison.texi: here.

diff --git a/NEWS b/NEWS
index d2131125..b0da7ecd 100644
--- a/NEWS
+++ b/NEWS
@@ -37,6 +37,10 @@ GNU Bison NEWS
   When given -fsyntax-only, the diagnostics are reported, but no output is
   generated.
 
+  The name of this option is somewhat misleading as bison does more than
+  just checking the syntax: every stage is run (including checking for
+  conflicts for instance), except the generation of the output files.
+
 *** Include the generated header (yacc.c)
 
   Before, when --defines is used, bison generated a header, and pasted an
@@ -102,7 +106,7 @@ GNU Bison NEWS
 
 *** Generated reports
 
-  The format of the reports (parse.output) was improved for readadibility.
+  The format of the reports (parse.output) was improved for readability.
 
 *** Better support for --no-line.
 
diff --git a/doc/bison.texi b/doc/bison.texi
index 4f29c837..93f3796d 100644
--- a/doc/bison.texi
+++ b/doc/bison.texi
@@ -10616,7 +10616,11 @@ The fix-its are applied by @command{bison} itself when 
given the option
 @option{-u}/@option{--update}.  See its documentation above.
 
 @item syntax-only
-Do not generate the output files.
+Do not generate the output files.  The name of this feature is somewhat
+misleading as more than just checking the syntax is done: every stage is run
+(including checking for conflicts for instance), except the generation of
+the output files.
+
 @end table
 @end table