process.c: fix rdoc of Process.getsid [ci skip]

* process.c (proc_getsid): [DOC] Fix double word 'for' and typo.
  [Fix GH-1080]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52441 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Wed Nov  4 11:38:23 2015  Jake Worth  <jakeworth82@gmail.com>
+
+	* process.c (proc_getsid): [DOC] Fix double word 'for' and typo.
+	  [Fix GH-1080]
+
 Wed Nov  4 06:01:52 2015  Eric Wong  <e@80x24.org>
 
 	* include/ruby/ruby.h (struct RObject): hide iv_index_tbl type

process.c

@@ -4500,7 +4500,7 @@ proc_setpgid(VALUE obj, VALUE pid, VALUE pgrp)
  *     Process.getsid()      -> integer
  *     Process.getsid(pid)   -> integer
  *
- *  Returns the session ID for for the given process id. If not give,
+ *  Returns the session ID for the given process id. If not given,
  *  return current process sid. Not available on all platforms.
  *
  *     Process.getsid()                #=> 27422