fix(emit): regression - keep comments in emit (#23815)

Closes https://github.com/denoland/deno/discussions/23814

cli/args/mod.rs

@@ -194,7 +194,7 @@ pub fn ts_config_to_transpile_and_emit_options(
     },
     deno_ast::EmitOptions {
       inline_sources: options.inline_sources,
-      keep_comments: false,
+      keep_comments: true,
       source_map,
       source_map_file: None,
     },

tests/specs/run/keep_comments_ts/__test__.jsonc

@@ -0,0 +1,4 @@
+{
+  "args": "run main.ts",
+  "output": "main.out"
+}

tests/specs/run/keep_comments_ts/main.out

@@ -0,0 +1,4 @@
+function test() {
+  // this comment should be in output
+  return 1 + 1;
+}

tests/specs/run/keep_comments_ts/main.ts

@@ -0,0 +1,7 @@
+function test() {
+  // this comment should be in output
+  return 1 + 1;
+}
+
+// should include the comments because people rely on this behavior
+console.log(test.toString());

tests/testdata/coverage/complex_expected.lcov

@@ -11,6 +11,11 @@ FNF:4
 FNH:2
 BRF:0
 BRH:0
+DA:1,1
+DA:13,1
+DA:14,1
+DA:15,1
+DA:16,1
 DA:17,2
 DA:18,2
 DA:19,2
@@ -21,6 +26,9 @@ DA:24,2
 DA:25,2
 DA:26,2
 DA:27,2
+DA:29,1
+DA:30,1
+DA:31,1
 DA:32,1
 DA:33,1
 DA:34,1
@@ -30,6 +38,8 @@ DA:38,2
 DA:39,2
 DA:40,2
 DA:42,2
+DA:44,1
+DA:45,1
 DA:46,0
 DA:47,0
 DA:48,0
@@ -39,13 +49,19 @@ DA:52,0
 DA:53,0
 DA:54,0
 DA:56,0
+DA:58,1
+DA:59,1
 DA:60,1
+DA:62,1
+DA:63,1
 DA:64,0
 DA:65,0
 DA:66,0
 DA:68,0
+DA:70,1
 DA:71,0
+DA:73,1
 DA:74,1
-LH:21
-LF:35
+LH:37
+LF:51
 end_of_record

tests/testdata/coverage/complex_expected.out

@@ -1,4 +1,4 @@
-cover [WILDCARD]/coverage/complex.ts ... 60.000% (21/35)
+cover [WILDCARD]/coverage/complex.ts ... 72.549% (37/51)
   46 | export function unused(
   47 |   foo: string,
   48 |   bar: string,