fix(nargo_fmt): let doc comment could come after regular comment (#7046)

Author: asterite

noir_stdlib/src/collections/umap.nr

@@ -114,8 +114,7 @@ impl<K, V, B> UHashMap<K, V, B> {
     {
         // docs:end:contains_key
         /// Safety: unconstrained context
-        unsafe { self.get(key) }
-            .is_some()
+        unsafe { self.get(key) }.is_some()
     }
 
     // Returns true if the map contains no elements.

tooling/nargo_fmt/src/formatter/statement.rs

@@ -23,10 +23,17 @@ impl<'a, 'b> ChunkFormatter<'a, 'b> {
 
         // Now write any leading comment respecting multiple newlines after them
         group.leading_comment(self.chunk(|formatter| {
+            // Doc comments for a let statement could come before a potential non-doc comment
             if formatter.token.kind() == TokenKind::OuterDocComment {
                 formatter.format_outer_doc_comments();
             }
+
             formatter.skip_comments_and_whitespace_writing_multiple_lines_if_found();
+
+            // Or doc comments could come after a potential non-doc comment
+            if formatter.token.kind() == TokenKind::OuterDocComment {
+                formatter.format_outer_doc_comments();
+            }
         }));
 
         ignore_next |= self.ignore_next;
@@ -390,6 +397,21 @@ mod tests {
         assert_format(src, expected);
     }
 
+    #[test]
+    fn format_let_statement_with_unsafe_and_comment_before_it() {
+        let src = " fn foo() { 
+        // Some comment
+        /// Safety: some doc
+        let  x  =  unsafe { 1 } ; } ";
+        let expected = "fn foo() {
+    // Some comment
+    /// Safety: some doc
+    let x = unsafe { 1 };
+}
+";
+        assert_format(src, expected);
+    }
+
     #[test]
     fn format_assign() {
         let src = " fn foo() { x  =  2 ; } ";