Rollup merge of #44548 - oyvindln:rustc_help_fix, r=arielb1
Rollup merge of #44548 - oyvindln:rustc_help_fix, r=arielb1

Add proper help line for `-C inline threshold`

Looks like someone accidentally some words when adding this.

This also remove a period on a different help line for consistency, as no options have a period.

aidancully/rust,aidancully/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust,graydon/rust,GBGamer/rust,aidancully/rust,GBGamer/rust,graydon/rust,graydon/rust,GBGamer/rust,GBGamer/rust,graydon/rust