git-p4: remove spaces between dictionary keys and colons

PEP8 makes no specific recommendation about spaces preceding colons in
dictionary declarations, but all the code examples contained with it
declare dictionaries with a single space after the colon, and none
before.

Signed-off-by: Joel Holdsworth <jholdsworth@nvidia.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

git-p4.py

@@ -4379,13 +4379,13 @@ def printUsage(commands):
 
 
 commands = {
-    "submit" : P4Submit,
-    "commit" : P4Submit,
-    "sync" : P4Sync,
-    "rebase" : P4Rebase,
-    "clone" : P4Clone,
-    "branches" : P4Branches,
-    "unshelve" : P4Unshelve,
+    "submit": P4Submit,
+    "commit": P4Submit,
+    "sync": P4Sync,
+    "rebase": P4Rebase,
+    "clone": P4Clone,
+    "branches": P4Branches,
+    "unshelve": P4Unshelve,
 }