Fix escaping in nested classes in verbose mode

README.md

@@ -145,8 +145,8 @@ One of `'default'` *(default)* or `'strict'`.
 
 Sets the level of emulation rigor/strictness.
 
-- `default`: Permits a few close approximations in order to support additional features.
-- `strict`: Throw if the pattern can't be emulated with identical behavior (even in rare edge cases) for the given `target`.
+- **Default:** Permits a few close approximations in order to support additional features.
+- **Strict:** Error if the pattern can't be emulated with identical behavior (even in rare edge cases) for the given `target`.
 
 <details>
   <summary>More details</summary>

src/generate.js

@@ -296,8 +296,13 @@ function genCharacterClass({negate, parent, elements}, state, gen) {
   if (!state.useFlagV && parent.type === AstTypes.CharacterClass) {
     throw new Error('Use of nested character class requires min target ES2024');
   }
+  const genClass = () => `[${negate ? '^' : ''}${elements.map(gen).join('')}]`;
+  if (state.inCharClass) {
+    return genClass();
+  }
+  // For the outermost char class, set state
   state.inCharClass = true;
-  const result = `[${negate ? '^' : ''}${elements.map(gen).join('')}]`;
+  const result = genClass();
   state.inCharClass = false;
   return result;
 }