Ruby » Ruby master

Add rdoc for Integer.sqrt

• numeric.c (rb_int_s_isqrt): [DOC] add rdoc for Integer.sqrt.
  [ruby-core:79762] [Bug #13251]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57719 b2dd03c8-39d4-4d8f-98ff-823fe69b080e