Fix some typos in comments (#7169)

This PR fixes a couple typos I found in some comments/doc comments.

Release Notes:

- N/A

crates/editor/src/editor.rs

@@ -2310,7 +2310,7 @@ impl Editor {
                 let mut bracket_pair = None;
                 let mut is_bracket_pair_start = false;
                 if !text.is_empty() {
-                    // `text` can be empty when an user is using IME (e.g. Chinese Wubi Simplified)
+                    // `text` can be empty when a user is using IME (e.g. Chinese Wubi Simplified)
                     //  and they are removing the character that triggered IME popup.
                     for (pair, enabled) in scope.brackets() {
                         if enabled && pair.close && pair.start.ends_with(text.as_ref()) {