ENH: improve PySide2 loading

jrversteegh · jrversteegh · commit ebb3741a64bd · 2016-10-11T23:22:13.000+02:00
Fixed number of arguments and pep 8 issue
diff --git a/lib/matplotlib/backends/qt_compat.py b/lib/matplotlib/backends/qt_compat.py
@@ -69,7 +69,8 @@
     except KeyError:
         raise RuntimeError(
             ('Unrecognized environment variable %r, valid values are:'
-             ' %r, %r or %r' % (QT_API_ENV, 'pyqt', 'pyside', 'pyqt5', 'pyside2')))
+             ' %r, %r, %r or %r' 
+             % (QT_API_ENV, 'pyqt', 'pyside', 'pyqt5', 'pyside2')))
     if QT_ENV_MAJOR_VERSION == QT_RC_MAJOR_VERSION:
         # Only if backend and env qt major version are
         # compatible use the env variable.
