ENV#fetch: fix documentation of raised exception

[Fix GH-1514]
Author:    Misty De Meo <mistydemeo@github.com>

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57371 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/hash.c b/hash.c
index 4672934566..3e7615876e 100644
--- a/hash.c
+++ b/hash.c
@@ -3263,7 +3263,7 @@ rb_f_getenv(VALUE obj, VALUE name)
  * Retrieves the environment variable +name+.
  *
  * If the given name does not exist and neither +default+ nor a block a
- * provided an IndexError is raised.  If a block is given it is called with
+ * provided an KeyError is raised.  If a block is given it is called with
  * the missing name to provide a value.  If a default value is given it will
  * be returned when no block is given.
  */