[patch] Improve docs for 128-bit integers in extend.texi

[Jonathan Wakely <jwakely.gcc@gmail.com>]

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Committed as obvious.

       * doc/extend.texi (__int128): Improve grammar.

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commit b907a92691dbabe5755bc82c5e66718c8b255f4c
Author: Jonathan Wakely <jwakely.gcc@gmail.com>
Date:   Tue Jan 22 21:36:04 2013 +0000

    	* doc/extend.texi (__int128): Improve grammar.

diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 8ce6e1e..076aa68 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -811,15 +811,15 @@ the middle operand uses the value already computed without the undesirable
 effects of recomputing it.
 
 @node __int128
-@section 128-bits integers
+@section 128-bit integers
 @cindex @code{__int128} data types
 
 As an extension the integer scalar type @code{__int128} is supported for
-targets having an integer mode wide enough to hold 128 bits.
+targets which have an integer mode wide enough to hold 128 bits.
 Simply write @code{__int128} for a signed 128-bit integer, or
 @code{unsigned __int128} for an unsigned 128-bit integer.  There is no
-support in GCC to express an integer constant of type @code{__int128}
-for targets having @code{long long} integer less than 128 bits wide.
+support in GCC for expressing an integer constant of type @code{__int128}
+for targets with @code{long long} integer less than 128 bits wide.
 
 @node Long Long
 @section Double-Word Integers