* bignum.c (str2big_poweroftwo): Extracted from rb_cstr_to_inum.
  (str2big_normal): Ditto.
  (str2big_karatsuba): Ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42776 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* bignum.c (ISDIGIT): Unused macro removed.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42777 b2dd03c8-39d4-4d8f-98ff-823fe69b080e