Merge pull request matplotlib#4177 from tacaswell/fix_typo

MNT : fix typo in no-lint flag

Author: efiring

lib/matplotlib/_pylab_helpers.py

@@ -86,7 +86,7 @@ def destroy_fig(cls, fig):
     def destroy_all(cls):
         # this is need to ensure that gc is available in corner cases
         # where modules are being torn down after install with easy_install
-        import gc  # nnqa
+        import gc  # noqa
         for manager in list(cls.figs.values()):
             manager.canvas.mpl_disconnect(manager._cidgcf)
             manager.destroy()