Clean up API docs for system/tests, J-Z, including subdirectories

Thanks!

The standard for menu callbacks is:
http://drupal.org/node/1354#menu-callback
- You need : instead of ;
- The next thing should be a verb like "Records the active trail for 403/404 pages" rather than "Used for ..."

So, most of this patch needs an update.

Thanks, looking better!

+++ b/core/modules/system/tests/modules/module_test/module_test.module
@@ -93,7 +93,7 @@ function module_test_menu() {
 }
 
 /**
- * Page callback for 'hook dynamic loading' test.
+ * Page callback: For 'hook dynamic loading' test.

These do not follow our standards for hook_menu callbacks:
https://drupal.org/node/1354#menu-callback
They need a verb. There are 4 in this file that need updating, one in session_test.module, and a couple in theme_test.module.

Other than that, the patch looks pretty good... Oh, here's another problem, in session_test.module:

+ * Page callback: Attempts to save a value with after disabling session.
  */
 function _session_test_no_set($value) {

"with after"? This doesn't quite make sense. :)

And can we fix the typo here:

+++ b/core/modules/system/tests/modules/url_alter_test/url_alter_test.install
...
+/**
  * Impelement hook_install().

These issues are a lot of work with very little tangible payoff, so I'm closing the rest of them as "won't fix". Your efforts on working on this issue were appreciated... it was just my fault for starting a task that was very difficult to get right.

Let's instead put our effort into fixing and reviewing documentation that is really unclear and/or wrong, and I hope that the people who worked on these issues are not afraid to jump into a more reasonable issue!