iseq.c (ruby_iseq_disasm_insn, ruby_iseq_disasm),
  process.c (pst_message), re.c (match_inspect): use rb_str_catf.

* dir.c (dir_inspect), iseq.c (iseq_inspect, insn_operand_intern): use
  rb_sprintf.

* error.c (rb_name_error, rb_raise, rb_loaderror, rb_fatal): use
  rb_vsprintf.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@18158 b2dd03c8-39d4-4d8f-98ff-823fe69b080e