Update src/query.ts

Co-authored-by: Kristján Oddsson <koddsson@github.com>

src/query.ts

@@ -21,6 +21,7 @@ export default function query(
   const keyIndex = text.lastIndexOf(key, cursor - 1)
   if (keyIndex === -1) return
 
+  // Stop matching at the lookBackIndex	
   if (keyIndex < lookBackIndex) return
 
   if (multiWord) {