[PATCH,fortran] remove duplicate word in documentation

[Steve Kargl]

I committed the following patch as obvious.

2011-07-21  Steven G. Kargl  <kargl@gcc.gnu.org>

	* gfortran.texi: Remove a duplicate word.

Index: gfortran.texi
===================================================================
--- gfortran.texi	(revision 176586)
+++ gfortran.texi	(working copy)
@@ -2461,7 +2461,7 @@ in GNU Fortran; therefore, these feature
 @node GNU Fortran Compiler Directives
 @section GNU Fortran Compiler Directives
 
-The Fortran standard standard describes how a conforming program shall
+The Fortran standard describes how a conforming program shall
 behave; however, the exact implementation is not standardized.  In order
 to allow the user to choose specific implementation details, compiler
 directives can be used to set attributes of variables and procedures
-- 
Steve