Run a minor code quality checker over the repo (#8524)

* Run a minor code quality checker over the repo

Largely targeted at spelling of common words and misc code issues.

* Update snapshots

src/utils/LazyValue.ts

@@ -29,7 +29,7 @@ export class LazyValue<T> {
      * Whether or not a cached value is present.
      */
     public get present(): boolean {
-        // we use a tracking variable just in case the final value is falsey
+        // we use a tracking variable just in case the final value is falsy
         return this.done;
     }