Add rdoc and test of Encoding#replicate.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@26068 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 9 insertions, 0 deletions

diff --git a/encoding.c b/encoding.c
index 2d50f9f8ac..22a03d0ae4 100644
--- a/encoding.c
+++ b/encoding.c
@@ -313,6 +313,15 @@ rb_enc_replicate(const char *name, rb_encoding *encoding)
     return idx;
 }
 
+/*
+ * call-seq:
+ *   enc.replicate(name) => encoding
+ *
+ * Returns a replicated encoding of _enc whose name is _name_.
+ * The new encoding should have the same byte structure of _enc_.
+ * If _name_ is used by another encoding, raise ArgumentError.
+ *
+ */
 static VALUE
 enc_replicate(VALUE encoding, VALUE name)
 {