Odd error string in chai-prefer-contains-to-index-of

[JoshuaKGoldberg]

Bug Report

• tslint-microsoft-contrib version: 6.0.0
• TSLint version: 5.11.0
• TypeScript version: 3.1.2
• Running TSLint via: CLI

TypeScript code being linted

expect(targetUrl.indexOf(twitterAuthUrl)).to.equal(-1,'...');

with tslint.json configuration:

{
    "extends": "tslint-microsoft-contrib",
    // ...
    "rules": {
        "chai-prefer-contains-to-index-of": true
    }
}

Actual behavior

Found chai call with indexOf that can be converted to .contain assertion:

Expected behavior

Found chai call with indexOf that can be converted to .contain assertion

Seems weird to have a : there. Might be a holdover from legacy formatting preferences on TSLint.

[JoshuaKGoldberg]

I'll take this on as a side mission to #489. Free for anyone to take on!

[JoshuaKGoldberg]

☠️ It's time! ☠️

Per #876, this repository is no longer accepting feature pull requests. TSLint is being deprecated and we recommend you switch to https://typescript-eslint.io.

Thanks for open sourcing with us, everyone!