matplotlib/matplotlib — pull request #1170 by leejjoon (2012-08-29 13:54:48+00:00)
Title: Uses tight_layout.get_subplotspec_list to check if all axes are compatible w/ tight_layout

An axes that uses axes_locator (even though the axes itself is not an instance of SubplotBase) can be compatible with tight_layout. This PR suppresses warning message for such case.