fix(codegen): avoid extra indent before empty do-while bodies (#27407)

Indented empty `do…while` bodies currently print extra whitespace between `do` and `;`. Skip the empty statement's indentation in both the JavaScript and Rust printers, keeping the semicolon directly after `do`.

crates/oxc_codegen/src/gen.rs

@@ -483,7 +483,13 @@ impl Gen for DoWhileStatement<'_> {
                 p.print_block_statement(block, ctx);
                 p.print_soft_space();
             }
-            Statement::EmptyStatement(s) => s.print(p, ctx),
+            Statement::EmptyStatement(s) => {
+                p.print_comments_at(s.span.start);
+                p.add_source_mapping(s.span);
+                p.print_semicolon();
+                p.print_soft_newline();
+                p.print_indent();
+            }
             _ => {
                 p.print_soft_newline();
                 p.indent();

crates/oxc_codegen/tests/integration/js.rs

@@ -320,7 +320,9 @@ fn for_stmt() {
 #[test]
 fn do_while_stmt() {
     test("do ; while (true)", "do;\nwhile (true);\n");
+    test("function f() { do; while (test()); }", "function f() {\n\tdo;\n\twhile (test());\n}\n");
     test_minify("do ; while (true)", "do;while(true);");
+    test_minify("function f() { do; while (test()); }", "function f(){do;while(test())}");
     test_minify("do break; while (true)", "do break;while(true);");
     test_minify("do continue; while (true)", "do continue;while(true);");
     test_minify("do debugger; while (true)", "do debugger;while(true);");

packages/codegen/src-js/print/statement.ts

@@ -639,8 +639,8 @@ function printDoWhileStatement(node: ESTree.DoWhileStatement, state: State): voi
     printBlockStatement(body, state);
     write(state, " ", CAT_OTHER);
   } else if (body.type === "EmptyStatement") {
-    printIndent(state);
     writeWithMap(state, ";\n", CAT_OTHER, body.start, body.end, body);
+    printIndent(state);
   } else {
     write(state, "\n", CAT_OTHER);
     state.indentLevel++;

packages/codegen/test/fixtures/coverage.ts

@@ -11,6 +11,12 @@ do {} while (false);
 do; while (false);
 do debugger; while (false);
 
+function f1() {
+  do {} while (false);
+  do; while (false);
+  do debugger; while (false);
+}
+
 switch (value) {}
 switch (value) {
   case true: