doc: fix -W and %expect documentation some.

* NEWS (2.4.3): Mention that there are documentation fixes.
* doc/bison.texinfo (Expect Decl): Make it clear that %expect
turns conflicts into errors not warnings.
(Shift/Reduce): Likewise.
(Bison Options): Don't mention -Wsyntax.  It doesn't exist.
(cherry picked from commit 3ffdd5f125)
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Joel E. Denny committed 2010-08-04 20:18:13 -04:00
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@@ -240,6 +240,8 @@ Bison News
errors in Bison 2.5. They will remain warnings, which should be
sufficient for POSIX while avoiding backward compatibility issues.
** Minor documentation fixes.
* Changes in version 2.4.2 (2010-03-20):
** Some portability problems that resulted in failures and livelocks