tests: fix test-casefolding.t output This change started with a387b0390082.

synthrepo: new filenames must not also be new directories, and vice-versa When generating many new files into a set of many possible new directories, there is the possibility that the same path is chosen as both file and directory. How likely this is depends on the size of the dictionary used, the generated directory structure and the number of generated files.

status: don't override _buildstatus() in workingcommitctx Now that the caching into _status is done in workingctx._dirstatestatus(), which workingcommitctx._dirstatestatus() does not call, there is no caching to prevent in _buildstatus(), so stop overriding it.

status: cache dirstate status in _dirstatestatus() Since it's only the dirstate status we cache, it makes more sense to cache it in the _dirstatestatus() method. Note that this change means the dirstate status will also be cached when status is requested between the working copy and some other revision, while we currently only cache the result if exactly the status between the working copy and its parent is requested.