Similar to 1517fe0, but for command_viewer

shlex.split by default runs in POSIX mode which seems to swallow slashes (\). By setting POSIX mode to False, this doesn't happen

Author: ig0774

viewers/command_viewer.py

@@ -112,7 +112,7 @@ def _run_command(self, command, pdf_file, tex_file=None, line='', col=''):
             if PY2:
                 command = str(command)
 
-            command = shlex.split(command)
+            command = shlex.split(command, False, False)
 
             if PY2:
                 command = [unicode(c) for c in command]