manifest: add match argument to diff and filesnotin As part of removing manifest.matches (since it is O(manifest)), let's start by adding match arguments to diff and filesnotin. As we'll see in later patches, these are the only flows that actually use matchers, so by moving the matching into the actual functions, other manifest implementations can make more efficient algorithsm. For instance, this will allow treemanifest diff's to only iterate over the files that are different AND meet the match criteria. No consumers are changed in this patches, but the code is fairly easy to verify visually. Future patches will convert consumers to use it. One test was affected because it did not use the kwargs version of the clean parameter.

fileset: drop false function signatures from revs() and status() docs They should be inserted by @predicate helper.

py3: factor out bytechr() function I also changed xrange(127) to range(127) as the number is relatively small.

vfs: use 'vfs' module directly in 'test-clone-uncompressed' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.

vfs: use 'vfs' module directly in 'test-filecache' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.

vfs: use 'vfs' module directly in 'test-parseindex' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.

vfs: use 'vfs' module directly in 'test-lock' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.

vfs: use 'vfs' module directly in 'contrib/undumprevlog' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.

vfs: use 'vfs' module directly in 'hgext.largefile' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.

vfs: use 'vfs' module directly in 'hgext.convert' Now that the 'vfs' classes moved in their own module, lets use the new module directly. We update code iteratively to help with possible bisect needs in the future.