fix typos

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41465 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -2,7 +2,7 @@ Thu Jun 20 08:09:29 2013  Koichi Sasada  <ko1@atdot.net>
 
 	* tool/gcbench.rb: Summary in one line.
 
-	* common.mk: separete gcbench-hash to gcbench-hash1 and gcbench-hash2.
+	* common.mk: separate gcbench-hash to gcbench-hash1 and gcbench-hash2.
 
 Thu Jun 20 08:07:23 2013  Tanaka Akira  <akr@fsij.org>
 
@@ -26,7 +26,7 @@ Thu Jun 20 07:30:35 2013  Koichi Sasada  <ko1@atdot.net>
 	* tool/hashbench1.rb, tool/hashbench2.rb: add two types GC bench.
 	  hashbench1: many temporal objects (GC by newobj)
 	  hashbench2: hash size becomes bigger and bigger (GC by malloc)
-	  Two benchs are executed by `gcbench-hash' rule.
+	  Two benches are executed by `gcbench-hash' rule.
 
 	* tool/rdocbench.rb: separated.