docs: Fix a few typos

compat/src/index.js

@@ -108,7 +108,7 @@ const unstable_batchedUpdates = (callback, arg) => callback(arg);
  * @template Arg
  * @template Result
  * @param {(arg: Arg) => Result} callback function that runs before the flush
- * @param {Arg} [arg] Optional arugment that can be passed to the callback
+ * @param {Arg} [arg] Optional argument that can be passed to the callback
  * @returns
  */
 const flushSync = (callback, arg) => callback(arg);

debug/src/debug.js

@@ -72,7 +72,7 @@ export function initDebug() {
 			errorInfo.componentStack = getOwnerStack(vnode);
 			oldCatchError(error, vnode, oldVNode, errorInfo);
 
-			// when an error was handled by an ErrorBoundary we will nontheless emit an error
+			// when an error was handled by an ErrorBoundary we will nonetheless emit an error
 			// event on the window object. This is to make up for react compatibility in dev mode
 			// and thus make the Next.js dev overlay work.
 			if (typeof error.then != 'function') {

test/polyfills.js

@@ -71,7 +71,7 @@ chai.use((chai, util) => {
 
 //
 // The following code overwrites karma's internal logging feature to
-// support a much prettier and humand readable represantation of
+// support a much prettier and humand readable representation of
 // console logs in our terminal. This includes indentation, coloring
 // and support for Map and Set objects.
 //