test: fix typos in test titles and comments

Apply test-only hunks from docs typo fixes: SharedRendererTests
duplicate word, SerializeAddon workaround comment, and mouse range
spelling in MouseService and InputHandler tests.

Co-authored-by: Daniel Imms <Tyriar@users.noreply.github.com>

src/common/InputHandler.test.ts

@@ -1241,7 +1241,7 @@ describe('InputHandler', () => {
       await inputHandler.parseP('\x1b[e');
       assert.deepEqual(getCursor(bufferService), [8, 5]);
     });
-    describe('should clamp cursor into addressible range', () => {
+    describe('should clamp cursor into addressable range', () => {
       it('CUF', async () => {
         bufferService.buffer.x = 10000;
         bufferService.buffer.y = 10000;