Save SVG test directly to file instead of its name.

QuLogic · QuLogic · commit 2679dddf8089 · 2016-12-22T18:06:12.000-05:00
Windows doesn't like opening files twice, so this needs to save to the
file name _outside_ the context (after it's been closed), or simply
write to the file object directly. There doesn't seem to be any pressing
need to use the file name, so just use the file object.
diff --git a/lib/matplotlib/tests/test_backend_svg.py b/lib/matplotlib/tests/test_backend_svg.py
@@ -217,8 +217,8 @@ def test_missing_psfont(mock):
     rc('text', usetex=True)
     fig, ax = plt.subplots()
     ax.text(0.5, 0.5, 'hello')
-    with tempfile.NamedTemporaryFile(suffix='.svg') as tmpfile:
-        fig.savefig(tmpfile.name)
+    with tempfile.TemporaryFile() as tmpfile:
+        fig.savefig(tmpfile, format='svg')
 
 
 if __name__ == '__main__':
