Add auto-fix of misspelled falsey to falsy

[GMartigny]

fix #190

[GMartigny]

Hi,

It feels like this should be in a separate rule as this is the only error "fixable".

The error message could be better, but I've gone with simplicity.

• Still need to update the documentation

[novemberborn]

Thanks for all your PRs @GMartigny!

It feels like this should be in a separate rule as this is the only error "fixable".

@sindresorhus?

[sindresorhus]

You need to update the readme and rule docs to indicate it's fixable.

In the rule docs, you can clarify exactly what is fixable.

[sindresorhus]

It feels like this should be in a separate rule as this is the only error "fixable".

I think it's fine to keep it in this rule.

[sindresorhus]

It feels like this should be in a separate rule as this is the only error "fixable".

eslint-plugin-ava/test/use-t-well.js

Lines 115 to 116 in ab64fde

	code: testCase('t.deepEqual.skip.skip(a, a);'),
	errors: [error('Too many chained uses of `skip`.')]

could potentially be fixable too.

[GMartigny]

You need to update the readme and rule docs to indicate it's fixable.

I updated the readme.md, but other fixable rules (no-only-test, no-skip-test) doc don't mention they are fixable.
What could be added to better communicate the fixable state ?

[sindresorhus]

I updated the readme.md, but other fixable rules (no-only-test, no-skip-test) doc don't mention they are fixable.

That's just an oversight. Would you be willing to fix those in a separate PR?

[sindresorhus]

What could be added to better communicate the fixable state ?

Explain what's fixable in the rule docs. Example: https://github.com/sindresorhus/eslint-plugin-unicorn/blob/master/docs/rules/prevent-abbreviations.md#prevent-abbreviations

[sindresorhus]

Explain what's fixable in the rule docs. Example: sindresorhus/eslint-plugin-unicorn:docs/rules/prevent-abbreviations.md@master#prevent-abbreviations

@GMartigny Can you add this to the rule documentation for this rule so this PR can be merged?