Missing case for regex/name replacement (camelCase, CamelCase)

[webberwang]

If the word is in the middle of a camelCase or CamelCase, it doesn't get replaced.

I think a cli option to add an optional regex pattern before the word to signify replacement would be good.

If we're replacing model, & we added a pattern of with.

withModel -> replaces Model remodel -> does not replace model