Allow more complex yaml structure and fix readme

[khalilgharbaoui]

I added .flatten to the array of ignored_words and only_lines_matching.

This way we can have a more complex YAML structure and do things like:

able_words: &able_words
  - available
  - considerable
  - unable
  
. . . 
ignored_words:
  - *able_words
  - ignoreme
  - measwell
. . . 

This won't change anything in the behavior of the gem and will just result in better native YAML support.
The final list would look like:

. . .
ignored_words:
  - available
  - considerable
  - unable
  - ignoreme
  - measwell
. . .

Please consider merging this?

[ashkulz]

Can you check why the tests are failing?

[khalilgharbaoui]

Can you check why the tests are failing?

@ashkulz I patched up the tests b5e8e78 they are all passing now. Something must have changed in Aspell itself because I think when you first made the tests the suggestions it returned were full of whitespaces and simply different to what it returns now.

Anyway, this had nothing to do with the current PR's main concerns, it would have failed with or without the flatten of arrays I added.

Please approve this one when you find the time.

Cheers,

Khalil

[khalilgharbaoui]

@ashkulz did you have chance to look at this?

[ashkulz]

I'm not sure why there's no checks from GitHub Actions?

[ashkulz]

@khalilgharbaoui can you rebase/merge with master so that the build status can be checked? I cherry-picked your test fix as 00a50d3.

[khalilgharbaoui]

@ashkulz all green pls

[ashkulz]

Release created and pushed to RubyGems, thanks for your contribution!