Even more coding style cleanup

Fixing some more pylint warnings:

W1401: Anomalous backslash in string
W0623: Redefining name 'name' from outer scope
W0702: No exception type(s) specified
E0102: name: function already defined line n

Change-Id: I5afcdb4771ce210390a79981937806e30900a93c

subcmds/grep.py

@@ -51,7 +51,7 @@ Examples
 
 Look for a line that has '#define' and either 'MAX_PATH or 'PATH_MAX':
 
-  repo grep -e '#define' --and -\( -e MAX_PATH -e PATH_MAX \)
+  repo grep -e '#define' --and -\\( -e MAX_PATH -e PATH_MAX \\)
 
 Look for a line that has 'NODE' or 'Unexpected' in files that
 contain a line that matches both expressions:

subcmds/init.py

@@ -147,7 +147,7 @@ to update the working directory files.
       r.ResetFetch()
       r.Save()
 
-    groups = re.split('[,\s]+', opt.groups)
+    groups = re.split(r'[,\s]+', opt.groups)
     all_platforms = ['linux', 'darwin']
     platformize = lambda x: 'platform-' + x
     if opt.platform == 'auto':

subcmds/sync.py

@@ -696,7 +696,7 @@ class _FetchTimes(object):
       try:
         try:
           self._times = pickle.load(f)
-        except:
+        except IOError:
           try:
             os.remove(self._path)
           except OSError:

subcmds/upload.py

@@ -297,7 +297,7 @@ Gerrit Code Review:  http://code.google.com/p/gerrit/
     try:
       # refs/changes/XYZ/N --> XYZ
       return refs.get(last_pub).split('/')[-2]
-    except:
+    except (AttributeError, IndexError):
       return ""
 
   def _UploadAndReport(self, opt, todo, original_people):