[ddc] Removing --minimal from reload suite diff logic

This was causing diff discrepancies on Mac vs Linux

Change-Id: I2b67b51d1aab959fa99de916d40d282fc5d19f8e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/384310
Reviewed-by: Nicholas Shahan <nshahan@google.com>
Auto-Submit: Mark Zhou <markzipan@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>

pkg/dev_compiler/test/hot_reload_suite.dart

@@ -766,13 +766,7 @@ String _diffWithFileUris(Uri file1, Uri file2,
     {String label = '', bool commented = true, bool trimHeaders = true}) {
   final file1Path = file1.toFilePath();
   final file2Path = file2.toFilePath();
-  final diffArgs = [
-    '-du',
-    '--width=120',
-    '--expand-tabs',
-    file1Path,
-    file2Path
-  ];
+  final diffArgs = ['-u', '--width=120', '--expand-tabs', file1Path, file2Path];
   _debugPrint("Running diff with 'diff ${diffArgs.join(' ')}'.", label: label);
   final diffProcess = Process.runSync('diff', diffArgs);
   final errOutput = diffProcess.stderr as String;

tests/hot_reload/framework_timing_test/main.2.dart

@@ -54,12 +54,12 @@ void main() {
 +    Expect.equals(2, hotRestartGeneration);
    }).then((_) {
 -    Expect.equals(1, hotRestartGeneration);
--  });
++    Expect.equals(2, hotRestartGeneration);
+   });
 -  Future.delayed(Duration(seconds: 5), () {
 -    throw Exception('Future from main.1.dart before hot restart. '
 -        'This should never run.');
-+    Expect.equals(2, hotRestartGeneration);
-   });
+-  });
 -
    hotRestart();
  }