Since I do "stupid" stuff like this all the time (and not just while coding), I like to use my lovely and user-friendly friend Kate (in KDE, of course) to regex search all lines for whatever and then to ask me if I want to replace whatever comes up. darkphorm suggested VIM, I'm suggesting Kate. (Frankly, I'm not sure you'd need regex support, but Kate even has a nifty regular expression editor if you need it.)

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Allolex