Explicitly close read and write of Popen to latex

jenshnielsen · jenshnielsen · commit 475f71579454 · 2014-10-18T09:53:55.000+01:00
This avoids a warning in the test suite on python3.4. When reading
and writing from directly from stdout and stdin of the process they
should be explicitly closed afterwards.
diff --git a/lib/matplotlib/backends/backend_pgf.py b/lib/matplotlib/backends/backend_pgf.py
@@ -342,9 +342,9 @@ def _cleanup(self):
         if not os.path.isdir(self.tmpdir):
             return
         try:
-            self.latex_stdin_utf8.close()
             self.latex.communicate()
-            self.latex.wait()
+            self.latex_stdin_utf8.close()
+            self.latex.stdout.close()
         except:
             pass
         try:
