Tracking issue: highlighting improvements / tweaks

[smjonas]

There are probably a million ways the highlighting algorithm can be improved. Here are some examples:

In progress

• [ ] input: oneword, output: hey, expected highlights: a single replacement highlight created by joining multiple highlights, any deletions should be removed. This would involve detecting word boundaries. Status: in progress, see #8.

Planned

• [ ] input: foo, output: o, expected highlights: a single replacement highlight (the suffix o should not have been truncated)

Completed

• [X] input timestamp, _ := strconv.Atoi(line[0]), output: timestamp = strconv.Atoi(line[0]),, check highlights! Fixed in f713c59.