templater: make _hybrid provide more list/dict-like methods So the JSON filter works.

templater: hide private variable of _hybrid

templater: remove __iter__() from _hybrid, resolve it explicitly The goal is to fix "{hybrid_obj|json}" output. A _hybrid object must act as a list or a dict as well as a generator of legacy template strings. Before, _hybrid.__iter__() was assigned for legacy template, which conflicted with list.__iter__() API. This patch drops _hybrid.__iter__() and makes stringify/flatten functions unwrap a generator instead.

templater: rewrite doc of _hybrid class as docstring

sortdict: fix .pop() to return a value My future patch will need it.

checkcode: only match pushd/popd as word otherwise it partially match common words like "pushdestination".

treemanifest: add walksubtrees api Adds a new function to treemanifest that allows walking over the directories in the tree. Currently it only accepts a matcher to prune the walk, but in the future it will also accept a list of trees and will only walk over subtrees that differ from the versions in the list. This will be useful for identifying what parts of the tree are new to this revision, which is useful when deciding the minimal set of trees to send to a client given that they have a certain tree already. Since this is intended for an extension to use, the only current consumer is a test. In the future this function may be useful for implementing other algorithms like diff and changegroup generation.

merge with stable

upgrade: drop the prefix to the '_finishdatamigration' function Now that we are in the 'upgrade' module we can simplify the name.

upgrade: drop the prefix to the '_filterstorefile' function Now that we are in the 'upgrade' module we can simplify the name.