git: correct some signature mismatches between dirstate and the Protocol class...
git: correct some signature mismatches between dirstate and the Protocol class
These were flagged by PyCharm when subclassing the Protocol class. Note that
both `is_changing_xxx` were only flagged when the Protocol class used a plain
field, as mentioned in the previous commit. After converting those attrs in the
Protocol class to @property to match the regular dirstate class, it stopped
flagging these. But I don't think that makes sense- `@property` should look
like an attribute to the outside world, not a callable.
