The changes are performed by calling
sed -i "s/withing/within/" `git grep -l withing` && git add . && git commit …
The process proposed by you does cost time to follow, but does not solve real problems in the concrete case. I am not going to create separate commit for each module. I find no XML files containing `withing` (or rather: I find only one such file and applying a change both in it and in the generated README file is OK).