cleaning up text documents?

[Dave Hunt <]

Thomas:

There are many such applications.  One of which is the line editor
called ed, which you should already have.  You can do global
search/replace, based on 'regular expressions', with or without
prompting.  In emacs, you have three search/replace commands:
"replace-string", "replace-regexp", and "query-replace".  Oh, how
could I forget, you can do global replace in vi.

-Dave