templates/map-cmdline.default

revlog: faster hash computation when one of the parent node is null

Because we often compute sha1(nullid), it's interesting to copy a precomputed
hash of nullid instead of computing everytime the same hash. Similarly, when
one of the parents is null, we can avoid a < comparison (sort).

Overall, this change adds a string equality comparison on each hash() call,
but when p2 is null, we drop one string < comparison, and copy a hash instead
of computing it. Since it is common to have revisions with only one parent,
this change makes hash() 25% faster when cloning a big repository.

changeset = 'changeset:   {rev}:{node|short}\n{branches}{tags}{parents}user:        {author}\ndate:        {date|date}\nsummary:     {desc|firstline}\n\n'
changeset_quiet = '{rev}:{node|short}\n'
changeset_verbose = 'changeset:   {rev}:{node|short}\n{branches}{tags}{parents}user:        {author}\ndate:        {date|date}\n{files}{file_copies}description:\n{desc|strip}\n\n\n'
changeset_debug = 'changeset:   {rev}:{node}\n{branches}{tags}{parents}{manifest}user:        {author}\ndate:        {date|date}\n{file_mods}{file_adds}{file_dels}{file_copies}{extras}description:\n{desc|strip}\n\n\n'
start_files = 'files:      '
file = ' {file}'
end_files = '\n'
start_file_mods = 'files:      '
file_mod = ' {file_mod}'
end_file_mods = '\n'
start_file_adds = 'files+:     '
file_add = ' {file_add}'
end_file_adds = '\n'
start_file_dels = 'files-:     '
file_del = ' {file_del}'
end_file_dels = '\n'
start_file_copies = 'copies:     '
file_copy = ' {name} ({source})'
end_file_copies = '\n'
parent = 'parent:      {rev}:{node|formatnode}\n'
manifest = 'manifest:    {rev}:{node}\n'
branch = 'branch:      {branch}\n'
tag = 'tag:         {tag}\n'
extra = 'extra:       {key}={value|stringescape}\n'