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That command only added header and cpp files - as opposed to doing hg git add *
Another helpful techniq is to do things like git commit and look carefully at the files you are committing. Then doing git diff <fileName> on each one is a good way to check what you have changed - generally speaking this is a big way to avoid accidentally checking in mistakes that you didn’t intend to commit to source control. Think of it as operating on a patient - you want to be careful that tools haven’t been accidentally left in the patient before we sew them up.
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