diff -u b/includes/bootstrap.inc b/includes/bootstrap.inc
--- b/includes/bootstrap.inc
+++ b/includes/bootstrap.inc
@@ -925,9 +925,9 @@
   }
   else {
     if (!isset($missing[$type][$name])) {
-      // Add the missing file to a temporary cache and throw an alert. This cache
-      // will be cleared on cron runs as well as when visiting the module and
-      // theme list pages.
+      // Add the missing file to a temporary cache and throw an alert.
+      // This cache will be cleared on cron runs as well as when visiting the
+      // module and theme list pages.
       $missing[$type][$name] = TRUE;
       cache_set('drupal_get_filename:missing', $missing, 'cache', REQUEST_TIME + 24 * 60 * 60);
     }
diff -u b/includes/update.inc b/includes/update.inc
--- b/includes/update.inc
+++ b/includes/update.inc
@@ -795,7 +795,7 @@
 function update_fix_d7_install_profile() {
   $profile = drupal_get_profile();
 
-  // Default profile has been renamed to Standard in D7.
+  // 'Default' profile has been renamed to 'Standard' in D7.
   // We change the profile here to prevent a broken record in the system table.
   // @see system_update_7049()
   if ($profile == 'default') {
diff -u b/modules/simpletest/tests/bootstrap.test b/modules/simpletest/tests/bootstrap.test
--- b/modules/simpletest/tests/bootstrap.test
+++ b/modules/simpletest/tests/bootstrap.test
@@ -434,11 +434,12 @@
     // Restore the original error handler.
     restore_error_handler();
 
-    // Get the bad records static from drupal_get_filename.
+    // Get the missing records static from drupal_get_filename().
     $missing = &drupal_static('drupal_get_filename:missing');
 
-    // Searching for an item that does not exist creates a static record in drupal_get_filename.
-    $this->assertTrue($missing['module'][$non_existing_module], 'Searching for an item that does not exist creates a static record in drupal_get_filename.');
+    // Searching for an item that does not exist creates a static record in
+    // drupal_get_filename().
+    $this->assertTrue($missing['module'][$non_existing_module], 'Searching for an item that does not exist creates a static record in drupal_get_filename().');
   }
 }