shelve: access status fields by name rather than index

record: access status fields by name rather than index It is safe to pass the full status to patch.diff() since it does its own slicing.

purge: access status fields by name rather than index

largefiles: access status fields by name rather than index

keyword: access status fields by name rather than index

hgcia: access status fields by name rather than index

context: store status class instead of plain tuple in self._status This improves readability a bit by allowing us to refer to statuses by name rather than index.

status: update and move documentation of status types to status class The various status types are currently documented on the dirstate.status() method. Now that we have a class for the status types, it makese sense to document the status types there instead. Only leave the bits related to lookup/unsure in the status() method documentation.

status: update various other methods to return new class

status: create class for status lists Callers of various status() methods (on dirstate, context, repo) get a tuple of 7 elements, where each element is a list of files. This results in lots of uses of indexes where names would be much more readable. For example, "status.ignored" seems clearer than "status[4]" [1]. So, let's introduce a simple named tuple containing the 7 status fields: modified, added, removed, deleted, unknown, ignored, clean. This patch introduces the class and updates the status methods to return instances of it. Later patches will update the callers. [1] Did you even notice that it should have been "status[5]"? (tweaked by mpm to introduce the class in scmutil and only change one user)