* es/line-log-further-fixes:
line-log: fix "log -LN" crash when N is last line of file
range-set: satisfy non-empty ranges invariant
t4211: demonstrate crash when first -L encountered is empty range
t4211: demonstrate empty -L range crash
range-set: fix sort_and_merge_range_set() corner case bug
range_set: fix coalescing bug when range is a subset of another
t4211: fix broken test when one -L range is subset of another