git-p4: ensure there is a single space around all operators

PEP8 requires that binary operators such as assignment and comparison
operators should always be surrounded by a pair of single spaces, and
recommends that all other binary operators should typically be surround
by single spaces.

The recommendation is given here in the "Other Recommendations"
section

https://www.python.org/dev/peps/pep-0008/#other-recommendations

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

git-p4.py

@@ -67,7 +67,7 @@ verbose = False
 defaultLabelRegexp = r'[a-zA-Z0-9_\-.]+$'
 
 # The block size is reduced automatically if required
-defaultBlockSize = 1<<20
+defaultBlockSize = 1 << 20
 
 p4_access_checked = False
 
@@ -201,7 +201,7 @@ def prompt(prompt_text):
         sys.stderr.flush()
         sys.stdout.write(prompt_text)
         sys.stdout.flush()
-        response=sys.stdin.readline().strip().lower()
+        response = sys.stdin.readline().strip().lower()
         if not response:
             continue
         response = response[0]
@@ -2339,7 +2339,7 @@ class P4Submit(Command, P4UserMap):
             # Create the label - use the same view as the client spec we are using
             clientSpec = getClientSpec()
 
-            labelTemplate  = "Label: %s\n" % name
+            labelTemplate = "Label: %s\n" % name
             labelTemplate += "Description:\n"
             for b in body:
                 labelTemplate += "\t" + b + "\n"
@@ -2842,7 +2842,7 @@ class P4Sync(Command, P4UserMap):
         files = []
         fnum = 0
         while "depotFile%s" % fnum in commit:
-            path =  commit["depotFile%s" % fnum]
+            path = commit["depotFile%s" % fnum]
             found = self.isPathWanted(decode_path(path))
             if not found:
                 fnum = fnum + 1
@@ -3925,7 +3925,7 @@ class P4Sync(Command, P4UserMap):
 
             p4Change = 0
             for branch in self.p4BranchesInGit:
-                logMsg =  extractLogMessageFromGitCommit(self.refPrefix + branch)
+                logMsg = extractLogMessageFromGitCommit(self.refPrefix + branch)
 
                 settings = extractSettingsGitLog(logMsg)