Fix bug where script fails when it encounters a socket (which is not a regular file). Fix bug where exception is raised if error occurred before parser object was returned from _buildParser(). Add a --notext option, so that just the file paths will be output on matches (both find and find/replace); useful with xargs. Patch by: Todd Larsen

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from django.dispatch import Signal

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request_started = Signal()

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request_finished = Signal()

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got_request_exception = Signal(providing_args=["request"])