Add a deprecation warning for Encoding#replicate.

Co-authored-by: Patrick Lin <patrick.lin@shopify.com>
Co-authored-by: Kevin Menard <kevin.menard@shopify.com>

Author: 3 people

CHANGELOG.md

@@ -44,6 +44,7 @@ Compatibility:
 * Do not autosplat a proc that accepts a single positional argument and keywords (#3039, @andrykonchin).
 * Support passing anonymous * and ** parameters as method call arguments (#3039, @andrykonchin).
 * Handle either positional or keywords arguments by default in `Struct.new` (#3039, @rwstauner).
+* Add a deprecation warning for `Encoding#replicate` (#3039, @patricklinpl, @manefz, @nirvdrum).
 
 Performance:
 

spec/tags/core/encoding/replicate_tags.txt

@@ -139,6 +139,8 @@ def names
   end
 
   def replicate(name)
+    warn 'Encoding#replicate is deprecated and will be removed in Ruby 3.3; use the original encoding instead', category: :deprecated, uplevel: 1
+
     Truffle::EncodingOperations.replicate_encoding(self, name)
   end