commands: use double-quotes for strings with single-quotes
The globalopts table contain a couple of \' still, but it was
normalized like that in
83238c1db6de.
revlog: remove support for punched/shallow
The feature was never finished, and there has been restructuring going on
since it was added.
revlog: remove support for parentdelta
We will introduce a more powerful and general delta concept instead,
called generaldelta.
store: break up reference cycle introduced in
9cbff8a39a2a
see also
996c1cd8f530