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)

running: init test1
result: None
running: add foo
result: 0
running: commit -m commit1 -d 2000-01-01 foo
result: None
running: commit -m commit2 -d 2000-01-02 foo
result: None
running: log -r 0
changeset:   0:0e4634943879
user:        test
date:        Sat Jan 01 00:00:00 2000 +0000
summary:     commit1

result: None
running: log -r tip
changeset:   1:45589e459b2e
tag:         tip
user:        test
date:        Sun Jan 02 00:00:00 2000 +0000
summary:     commit2

result: None