bookmarks: rely on exception for malformed lines
Since we already have an exception context open, for other thing, we can
simplify the code a bit and rely on exception handling for invalid lines.
Speed is not the main motivation for this changes. However as I'm in the middle
of benchmarking things we can see a small positive impact.
Before:
! wall 0.009358 comb 0.000000 user 0.000000 sys 0.000000 (best of 303)
After:
! wall 0.009173 comb 0.010000 user 0.010000 sys 0.000000 (best of 310)
%include map-cmdline.default
changeset = '{cset}{lbisect}{branches}{bookmarks}{tags}{parents}{user}{ldate}{summary}\n'
changeset_quiet = '{lshortbisect} {rev}:{node|short}\n'
changeset_verbose = '{cset}{lbisect}{branches}{bookmarks}{tags}{parents}{user}{ldate}{lfiles}{lfile_copies_switch}{description}\n'
changeset_debug = '{fullcset}{lbisect}{branches}{bookmarks}{tags}{lphase}{parents}{manifest}{user}{ldate}{lfile_mods}{lfile_adds}{lfile_dels}{lfile_copies_switch}{extras}{description}\n'
# We take the zeroth word in order to omit "(implicit)" in the label
bisectlabel = ' bisect.{word('0', bisect)}'
lbisect ='{label("log.bisect{if(bisect, bisectlabel)}",
"bisect: {bisect}\n")}'
lshortbisect ='{label("log.bisect{if(bisect, bisectlabel)}",
"{bisect|shortbisect}")}'