fix internal error when using rustfmt::skip with newline on stmt (rust-lang#3785)

Author: rchaser53

src/expr.rs

@@ -516,6 +516,11 @@ pub(crate) fn rewrite_block_with_visitor(
     let inner_attrs = attrs.map(inner_attributes);
     let label_str = rewrite_label(label);
     visitor.visit_block(block, inner_attrs.as_ref().map(|a| &**a), has_braces);
+    let visitor_context = visitor.get_context();
+    context
+        .skipped_range
+        .borrow_mut()
+        .append(&mut visitor_context.skipped_range.borrow_mut());
     Some(format!("{}{}{}", prefix, label_str, visitor.buffer))
 }
 

tests/target/issue-3717.rs

@@ -0,0 +1,7 @@
+fn main() {
+    {
+        #[rustfmt::skip]
+        let _ = 
+        [1];
+    }
+}