I suggest that those two named functions have parameters which are declared as const, since the documents seem to indicate that they are not actually changed - it looks like the copy of the pointer passed as arguments is simply shifted up by the amount of whitespace (in the case of strchug) and returned.

If that is the case, then I'd like to see the parameters marked const. If the stuff is actually changed, though, then I'd like some change in the documentation to indicate that data you pass to those commands should be strdup'd before passing.

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