[pgAdmin4][Patch]: PEP-8 fix

[Khushboo Vashi]

Hi,

Please find a small pep-8 fix.

Thanks,
Khushboo

diff --git a/web/pgAdmin4.py b/web/pgAdmin4.py
index 138ce69..6d0453b 100644
--- a/web/pgAdmin4.py
+++ b/web/pgAdmin4.py
@@ -55,7 +55,7 @@ if not os.path.isfile(config.SQLITE_PATH):
         os.path.dirname(os.path.realpath(u(__file__, fs_encoding))),
         u'setup.py'
     )
-    exec (open(file_quote(setupfile), 'r').read())
+    exec(open(file_quote(setupfile), 'r').read())
 
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 # Server startup