progress: make determinate bar more like wget progress bar
foo [ ] 0/58
foo [> ] 1/58
foo [=> ] 2/58
...
foo [=======================================================> ] 56/58
foo [========================================================> ] 57/58
foo [=========================================================>] 58/58
The bar now has a '>' character at the end. This indicates the direction,
is consistent with the indeterminate '<=>' bar, and looks much nicer.
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
removing b
created new head
% should abort
abort: crosses branches (use 'hg merge' to merge or use 'hg update -C' to discard changes)
% should succeed
1 files updated, 0 files merged, 0 files removed, 0 files unresolved