git-p4: open temporary patch file for write only

The patchRCSKeywords method creates a temporary file in which to store
the patched output data. Previously this file was opened in "w+" mode
(write and read), but the code never reads the contents of the file
while open, so it only needs to be opened in "w" mode (write-only).

Signed-off-by: Joel Holdsworth <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: jhol

git-p4.py

@@ -1754,7 +1754,7 @@ def patchRCSKeywords(self, file, regexp):
         # Attempt to zap the RCS keywords in a p4 controlled file matching the given regex
         (handle, outFileName) = tempfile.mkstemp(dir='.')
         try:
-            with os.fdopen(handle, "w+") as outFile, open(file, "r") as inFile:
+            with os.fdopen(handle, "w") as outFile, open(file, "r") as inFile:
                 for line in inFile.readlines():
                     outFile.write(regexp.sub(r'$\1$', line))
             # Forcibly overwrite the original file