git-p4: remove spaces around default arguments

PEP8 recommends that there should be no spaces around the = sign of
default argument values of functions.

This guideline is described here:
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

@@ -1040,7 +1040,7 @@ def branch_exists(branch):
     return out.rstrip() == branch
 
 
-def findUpstreamBranchPoint(head = "HEAD"):
+def findUpstreamBranchPoint(head="HEAD"):
     branches = p4BranchesInGit()
     # map from depot-path to branch name
     branchByDepotPath = {}
@@ -1068,7 +1068,7 @@ def findUpstreamBranchPoint(head = "HEAD"):
     return ["", settings]
 
 
-def createOrUpdateBranchesFromOrigin(localRefPrefix = "refs/remotes/p4/", silent=True):
+def createOrUpdateBranchesFromOrigin(localRefPrefix="refs/remotes/p4/", silent=True):
     if not silent:
         print("Creating/updating branch(es) in %s based on origin branch(es)"
                % localRefPrefix)
@@ -2838,7 +2838,7 @@ class P4Sync(Command, P4UserMap):
                 return True
         return False
 
-    def extractFilesFromCommit(self, commit, shelved=False, shelved_cl = 0):
+    def extractFilesFromCommit(self, commit, shelved=False, shelved_cl=0):
         files = []
         fnum = 0
         while "depotFile%s" % fnum in commit:
@@ -3269,7 +3269,7 @@ class P4Sync(Command, P4UserMap):
                     'rev': record['headRev'],
                     'type': record['headType']})
 
-    def commit(self, details, files, branch, parent = "", allow_empty=False):
+    def commit(self, details, files, branch, parent="", allow_empty=False):
         epoch = details["time"]
         author = details["user"]
         jobs = self.extractJobsFromCommit(details)
@@ -4415,8 +4415,8 @@ def main():
 
     parser = optparse.OptionParser(cmd.usage.replace("%prog", "%prog " + cmdName),
                                    options,
-                                   description = cmd.description,
-                                   formatter = HelpFormatter())
+                                   description=cmd.description,
+                                   formatter=HelpFormatter())
 
     try:
         (cmd, args) = parser.parse_args(sys.argv[2:], cmd)