2/23  For emacs guru.  Within a region, I want to insert a carriage return
      before some keyword.  I was hoping I can express carriage return
      as string expression thus just simply replace string.  But instead,
      I got: ^Mkeyword.......^Mkeyword..... etc.
      What is the right way to do this?             --- kngharv
      \_ ob^X^Cperl