Fix fixer for require-hyphen-before-param-description

[jasminexie]

Thank you for the quick response to #265, but it appears I haven't tested thoroughly. Sincerest apologies!

This PR fixes hyphen insertion for the following cases:

• Parameter name and description are equal

/*
 *@param foo foo
 */
function () {}

by replacing the last occurrence in a line, not the first.

• Multiline descriptions

/*
 * @param foo single line
 * another line
 */
 function () {}

by replacing the (last occurrence of (the first line of the description)) in a line.

That's a mouthful :/
Hopefully this will have covered all cases. Please let me know if I've missed anything.

[gajus]

🎉 This PR is included in version 7.2.2 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀

[brettz9]

Thanks for the fixes!

Btw, if you're ever in Shenzhen, we've had a kind of informal meeting for open source... brettz9 is my WeChat ID...