Fast multi-file find and replace

From PyPI:

$ pip install mffr

Or by downloading the source and running:

$ python setup.py install

Latest git version:

$ pip install -e git+git://github.com/cybertk/mffr.git#egg=mffr

In your git repo directory

$ mffr REGEXP REPLACEMENT

This will find REGEXP in all files tracked by git and replace with REPLACEMENT.