- Does nothing if no search string is supplied or if it is larger than the source string
- Compare directly if search and source string are equal in length

Signed-off-by: Jack Del Vecchio <[email protected]>

- Add unit tests for special case

- Add ensureCapacity(newlen)

- Add additional parameter to replaceString that returns whether a match was found
- Wait to allocate memory until a match is made rather than at the beginning of the search
- Avoid copying source into result if source wasn't changed

- Move the target into the source rather than copy and skip allocating.
- Add tests for each case of target length

- Returns a bool indicating whether a match was made
- Accepts a parameter to force a copy even if no match was found