Style change: Rename error variables "e" -> "error"

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py b/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py
index 5293ccb16b9345041b152677f33af0ffc10956c2..e6e53a8d52887222f1b980fde6c3dede6440d2a2 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py
@@ -73,10 +73,10 @@ class PrettyDiff(Command):
             # We return the pretty_diff_file here because we need to keep the
             # file alive until the user has had a chance to confirm the diff.
             return pretty_diff_file
-        except ScriptError as e:
+        except ScriptError as error:
             _log.warning("PrettyPatch failed.  :(")
-            _log.error(e.message_with_output())
-            self._exit(e.exit_code or 2)
+            _log.error(error.message_with_output())
+            self._exit(error.exit_code or 2)
         except OSError:
             _log.warning("PrettyPatch unavailable.")