string.c: minor grammar fix [ci skip]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53509 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/string.c b/string.c
index c553ee26b9..deea8a11f7 100644
--- a/string.c
+++ b/string.c
@@ -8600,7 +8600,7 @@ rb_str_b(VALUE str)
  *  call-seq:
  *     str.valid_encoding?  -> true or false
  *
- *  Returns true for a string which encoded correctly.
+ *  Returns true for a string which is encoded correctly.
  *
  *    "\xc2\xa1".force_encoding("UTF-8").valid_encoding?  #=> true
  *    "\xc2".force_encoding("UTF-8").valid_encoding?      #=> false