merges r20917 from trunk into ruby_1_9_1.

rdoc update.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@21004 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/thread.c b/thread.c
index 04138cb87..31138611e 100644
--- a/thread.c
+++ b/thread.c
@@ -2006,7 +2006,7 @@ rb_thread_priority_set(VALUE thread, VALUE prio)
 #if defined(NFDBITS) && defined(HAVE_RB_FD_INIT)
 
 /*
- * several Unix platform supports file descriptors bigger than FD_SETSIZE
+ * several Unix platforms supports file descriptors bigger than FD_SETSIZE
  * in select(2) system call.
  *
  * - Linux 2.2.12 (?)