doc: fix comments in test-fs-watch.js

PR-URL: nodejs#41046
Reviewed-By: Mohammed Keyvanzadeh <[email protected]>
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Anto Aravinth <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>

Author: jakub-g

test/parallel/test-fs-watch.js

@@ -22,14 +22,14 @@ class WatchTestCase {
 }
 
 const cases = [
-  // Watch on a directory should callback with a filename on supported systems
+  // Watch on a file should callback with a filename on supported systems
   new WatchTestCase(
     common.isLinux || common.isOSX || common.isWindows || common.isAIX,
     'watch1',
     'foo',
     'filePath'
   ),
-  // Watch on a file should callback with a filename on supported systems
+  // Watch on a directory should callback with a filename on supported systems
   new WatchTestCase(
     common.isLinux || common.isOSX || common.isWindows,
     'watch2',