Need to flag "along way" as a mistake for "a long way"

I was sure I'd worked on this ages ago but I just read this sentence in a YouTube comment and dogfooded it:

> kevin rudd has **come along way** ..he has matured and learned about the world ...

Search the repository for existing grammar rules and their tests, starting with rules that detect incorrect word spacing or substitutions. Add coverage for “come along way” and verify that it is flagged with “a long way” as the suggested wording; run the relevant rule tests and the broader test suite if needed.

Written by the indexing model from the issue text.