help: move "revision syntax" help topics into online help
Move the "Specifying Single Revisions" and "Specifying Multiple
Revisions" help topics from the manual page into the helptable
so they are available both online and in the manual page.
help: helptable is an ordered collection
The helptable is used for helptopics listed in the manual
page, so the order of topics should not be random.
Convert it from a dictionary into a tuple of tuples.
Also reorder helptable entries to keep previous manual
page order.
help: enable listing of a subset of the command list
Instead of giving the "command %s is ambiguous" error message
with a bare list of possible command, display help list
for all commands starting with the given string.
addremove: correctly handle intermediate symlinks
This fixes problems mentioned in
issue660 comments (unrelated to original
issue) where directory was renamed, and symlink was added instead.
In such situation addremove wasn't able to correctly detect that old files
no longer here, but tried to add symlink (and failed due collision with
old files).