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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def clean_errors(self):
 """Clean errors and unhighlight them in vim."""

        self._vim.eval('clearmatches()')
        self._errors = []
        self._matches = []
        # Reset Syntastic notes - TODO: bufdo?
        self._vim.current.buffer.vars['ensime_notes'] = []