Ignore dangling comments when checking type parameter comments (#19572)

changelog_unreleased/typescript/19572.md

@@ -0,0 +1,24 @@
+#### Ignore comments inside mapped type when checking type parameter comments (#19572 by @fisker)
+
+<!-- prettier-ignore -->
+```tsx
+// Input
+foo<{
+  // comment
+  [key in keyof Foo]: number
+}>();
+
+// Prettier stable
+foo<
+  {
+    // comment
+    [key in keyof Foo]: number;
+  }
+>();
+
+// Prettier main
+foo<{
+  // comment
+  [key in keyof Foo]: number;
+}>();
+```