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/editor/dom.ts

@@ -178,7 +178,7 @@ function getTextNodeValue(node: Node): string {
         if (nodeText.length !== 1) {
             return nodeText.replace(CARET_NODE_CHAR, "");
         } else {
-            // only contains ZWS, which is ignored, so return emtpy string
+            // only contains ZWS, which is ignored, so return empty string
             return "";
         }
     } else {

src/editor/operations.ts

@@ -37,7 +37,7 @@ export function formatRange(range: Range, action: Formatting): void {
         range.trim();
     }
 
-    // Edgecase when just selecting whitespace or new line.
+    // Edge case when just selecting whitespace or new line.
     // There should be no reason to format whitespace, so we can just return.
     if (range.length === 0) {
         return;