Test: Strip internal functions from stacktraces in fixtures

I'm currently evaluating esbuild, and this produces slightly different
function names (e.g. `module2` instead of `module$1`).

Normalize these away, similar to what we do with Node.js internal
call frames already.

test/cli/fixtures/expected/tap-outputs.js

@@ -114,8 +114,7 @@ Last test to run (hanging) has an async hold. Ensure all assert.async() callback
   stack: |
     Error: outside of a test context
         at /qunit/test/cli/fixtures/unhandled-rejection.js:17:18
-        at processModule (/qunit/qunit/qunit.js)
-        at Object.module$1 [as module] (/qunit/qunit/qunit.js)
+        at qunit.js
         at /qunit/test/cli/fixtures/unhandled-rejection.js:3:7
         at internal
   ...
@@ -149,10 +148,7 @@ not ok 1 global failure
   expected: undefined
   stack: |
     Error: No tests were run.
-        at done (/qunit/qunit/qunit.js)
-        at advanceTestQueue (/qunit/qunit/qunit.js)
-        at Object.advance (/qunit/qunit/qunit.js)
-        at unblockAndAdvanceQueue (/qunit/qunit/qunit.js)
+        at qunit.js
         at internal
   ...
 1..1
@@ -254,10 +250,7 @@ not ok 1 global failure
   expected: undefined
   stack: |
     Error: No tests matched the filter "no matches".
-        at done (/qunit/qunit/qunit.js)
-        at advanceTestQueue (/qunit/qunit/qunit.js)
-        at Object.advance (/qunit/qunit/qunit.js)
-        at unblockAndAdvanceQueue (/qunit/qunit/qunit.js)
+        at qunit.js
         at internal
   ...
 1..1
@@ -487,7 +480,7 @@ not ok 1 global failure
   stack: |
     Error: No dice
         at /qunit/test/cli/fixtures/bad-callbacks/begin-throw.js:2:8
-        at /qunit/qunit/qunit.js
+        at qunit.js
         at internal
   ...
 Bail out! Error: No dice`,
@@ -507,7 +500,7 @@ Bail out! Error: No dice
   stack: |
     Error: No dice
         at /qunit/test/cli/fixtures/bad-callbacks/done-throw.js:2:8
-        at /qunit/qunit/qunit.js
+        at qunit.js
         at internal
   ...`,
 
@@ -585,7 +578,7 @@ Bail out! Error: Unexpected release of async pause after tests finished.
   stack: |
     Error: Unexpected release of async pause after tests finished.
     > Test: extra done scheduled outside any test [async #1]
-        at Timeout.release [as _onTimeout] (/qunit/qunit/qunit.js)
+        at qunit.js
         at internal
   ...`,
 

test/cli/helpers/execute.js

@@ -18,11 +18,12 @@ function normalize( actual ) {
 		// Replace backslashes (\) in stack traces on Windows to POSIX
 		.replace( reSep, "/" )
 
-		// Convert "at processModule (/qunit/qunit/qunit.js:1:2)" to "at processModule (/qunit/qunit/qunit.js)"
-		.replace( /(\/qunit\/qunit\/qunit\.js):\d+:\d+\)/g, "$1)" )
+		// Convert "at processModule (/qunit/qunit/qunit.js:1:2)" to "at qunit.js"
+		// Convert "at /qunit/qunit/qunit.js:1:2" to "at qunit.js"
+		.replace( /^(\s+at ).*\/qunit\/qunit\/qunit\.js.*$/gm, "$1qunit.js" )
 
-		// Convert "at /qunit/qunit/qunit.js:1:2" to "at /qunit/qunit/qunit.js"
-		.replace( /( {2}at \/qunit\/qunit\/qunit\.js):\d+:\d+/g, "$1" )
+		// Convert any "/qunit/qunit/qunit.js:1:2" to "/qunit/qunit/qunit.js"
+		.replace( /(\/qunit\/qunit\/qunit\.js):\d+:\d+/g, "$1" )
 
 		// Strip inferred names for anonymous test closures (as Node 10 did),
 		// to match the output of Node 12+.
@@ -48,11 +49,11 @@ function normalize( actual ) {
 		// Convert "at load (/qunit/node_modules/append-transform/index.js:6" to "at internal"
 		.replace( / {2}at .+\/.*node_modules\/append-transform\/.*\)/g, "  at internal" )
 
-		// merge successive lines after initial frame
-		.replace( /(\n\s+at internal)+/g, "$1" )
+		// Consolidate subsequent qunit.js frames
+		.replace( /^(\s+at qunit\.js$)(\n\s+at qunit\.js$)+/gm, "$1" )
 
-		// merge successive line with initial frame
-		.replace( /(at internal)\n\s+at internal/g, "$1" );
+		// Consolidate subsequent internal frames
+		.replace( /^(\s+at internal$)(\n\s+at internal$)+/gm, "$1" );
 }
 
 /**