Proper way to spellcheck the "n't" (like "shouldn't") abbreviation?

[xtendo-org]

First of all, thanks for a great plugin. Loving it for years.

Actual behavior

Today I noticed that writing shouldn't will cause SpellBad highlight by spelunker.vim.

More specifically, on the shouldn part, presumably because spelunker.vim recognizes the apostrophe as a word boundary.

Curiously though, there's a subtle difference in the way the abbreviations are highlighted:

• wouldn't: SpelunkerSpellBad
• shouldn't: SpelunkerSpellBad
• hadn't: SpelunkerSpellBad
• couldn't: SpelunkerComplexOrCompoundWord

Expected behavior

I think shouldn't shouldn't (no pun intended) be SpellBad.

Abbreviations like "wouldn't" or "shouldn't" or "couldn't" are, as far as I can tell, very very common in English. They are listed on most English dictionaries (I checked Oxford, Merriam-Webster, and Cambridge).

Not as common as the examples above, but in my opinion, abbreviations like "mustn't" and "shan't" also deserve to be considered correct. (Because when you see a "mustn't" surrounded by spaces, you can be quite certain it's not a spelling mistake.)

Observations

• Adding wouldn't to my spellfile does not solve this; the wouldn part is still recognized as a spelling error by spelunker.vim.
• Adding wouldn to my spellfile does clear the SpellBad highlight, but this introduces a whole new problem: spelunker.vim now becomes oblivious to obvious errors like That wouldn cut it. Oh no! I think this one's cost is greater than the benefit.
• Ideally, I hope spelunker.vim provide a way to correctly recognize a "single word" that includes an apostrophe in it.

[KSR-Yasuda]

The same issue of #81.
Merge the patch if you're in a hurry.
This plugin looks not cared for long.

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This issue would be because of the mechanism of this plugin.

It splits each word into more small parts by symbol or capital letter appearances.
This is intended to handle compound terms such as spell_check or spellCheck.

Unfortunately, words of abbreviation of "not" are also chopped the same:
couldn and t for the word couldn't, for example.
Spelunker checks the spell of each split part of the word, and warns the weird subpart couldn as you see.

To care such cases, the author has prepared a white list to exclude such subtle cases.
The patch above is what to append more XXXn't-abbreviations not covered.

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However, it is the same to add such subparts into your spell file.
What you pointed out, wouldn of That wouldn cut it comes to be overlooked, is unavoidable.

Since it is a developer-targeted spell checker,
I think you can't expect they would do special treatment for apostrophe ('),
that is also used for a separator in programming context.