numeric.c: numeric ndigits
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54626 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
numeric.c: numeric ndigits
parameter, digits, as well as Numeric#round. [Feature #12245]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54626 b2dd03c8-39d4-4d8f-98ff-823fe69b080e