improve comment

Author: wxiaoguang

web_src/js/features/comp/TextExpander.ts

@@ -51,6 +51,7 @@ export function initTextExpander(expander: TextExpanderElement) {
 
   const textarea = expander.querySelector<HTMLTextAreaElement>('textarea');
 
+  // help to fix the text-expander "multiword+promise" bug: do not show the popup when there is no "#" before current line
   const shouldShowIssueSuggestions = () => {
     const posVal = textarea.value.substring(0, textarea.selectionStart);
     const lineStart = posVal.lastIndexOf('\n');
@@ -59,8 +60,8 @@ export function initTextExpander(expander: TextExpanderElement) {
   };
 
   const debouncedIssueSuggestions = debounce(async (key: string, text: string): Promise<TextExpanderProvideResult> => {
-    // Upstream bug: when using "multiword", TextExpander will get wrong "key" position.
-    // To reproduce, use the "await sleep" below,
+    // Upstream bug: when using "multiword+promise", TextExpander will get wrong "key" position.
+    // To reproduce, comment out the "shouldShowIssueSuggestions" check, use the "await sleep" below,
     // then use content "close #20\nclose #20\close #20", keep changing the last line `#20` part from the end (including removing the `#`)
     // There will be a JS error: Uncaught (in promise) IndexSizeError: Failed to execute 'setStart' on 'Range': The offset 28 is larger than the node's length (27).
     if (!shouldShowIssueSuggestions()) return {matched: false};