bug: Single letter allowed mid scentence but not before a period

[dvdsk]

input:

// We slice the M bars off such that they are the same height
// as the highest next bar not in M.

behavior:

The letter M at the end of the sentence is highlighted as a spelling mistake. Harper offers to:

• Add "m." to file dictionary
• Add "m." to global dictionary
• Replace with: "M"
• Replace with: "MAX"
• Replace with: "MA"

expected:

No lint/error from harper since the single letter M also did not trigger a lint/error

[elijah-potter]

Hmmm. That's quite odd. It looks like the initialism parser is having a fit here. I'll see what I can do and push out a release asap.