Fix typos in arith.texi

[Joseph S. Myers]

I noticed a typo appearing twice in arith.texi.  I've committed this patch 
as obvious to fix it.

diff --git a/ChangeLog b/ChangeLog
index beca929..ff6a493 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2012-12-01  Joseph Myers  <joseph@codesourcery.com>
+
+	* manual/arith.texi (feenableexcept): Fix typo.
+	(fedisableexcept): Likewise.
+
 2012-11-30  Roland McGrath  <roland@hack.frob.com>
 
 	* sysdeps/powerpc/powerpc64/entry.h (TEXT_START): Define using a
diff --git a/manual/arith.texi b/manual/arith.texi
index 3f4e56a..f387c8f 100644
--- a/manual/arith.texi
+++ b/manual/arith.texi
@@ -1064,7 +1064,7 @@ occur, you can use the following two functions.
 @comment GNU
 @deftypefun int feenableexcept (int @var{excepts})
 This functions enables traps for each of the exceptions as indicated by
-the parameter @var{except}.  The individual excepetions are described in
+the parameter @var{except}.  The individual exceptions are described in
 @ref{Status bit operations}.  Only the specified exceptions are
 enabled, the status of the other exceptions is not changed.
 
@@ -1076,7 +1076,7 @@ operation was successful, @code{-1} otherwise.
 @comment GNU
 @deftypefun int fedisableexcept (int @var{excepts})
 This functions disables traps for each of the exceptions as indicated by
-the parameter @var{except}.  The individual excepetions are described in
+the parameter @var{except}.  The individual exceptions are described in
 @ref{Status bit operations}.  Only the specified exceptions are
 disabled, the status of the other exceptions is not changed.
 

-- 
Joseph S. Myers
joseph@codesourcery.com