string.c: backref substitution
re.c (rb_reg_regsub): allow nil regexp for string matching.
string.c (rb_str_sub_bang, str_gsub): make substitution if replacement string has backref escapes.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by nobu (Nobuyoshi Nakada) over 11 years ago
string.c: backref substitution
re.c (rb_reg_regsub): allow nil regexp for string matching.
string.c (rb_str_sub_bang, str_gsub): make substitution if
replacement string has backref escapes.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45459 b2dd03c8-39d4-4d8f-98ff-823fe69b080e