Ruby » Ruby master

Fix doc for Hash#dig and Struct#dig

• hash.c (rb_hash_dig): [DOC] correct argument name
  in method description; fix formatting in examples.
• struct.c (rb_struct_dig): ditto.

[ruby-core:79221] [Bug #13148]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57735 b2dd03c8-39d4-4d8f-98ff-823fe69b080e