diff --git a/core/modules/breakpoint/src/BreakpointManager.php b/core/modules/breakpoint/src/BreakpointManager.php
index 92faaf9..f23afbe 100644
--- a/core/modules/breakpoint/src/BreakpointManager.php
+++ b/core/modules/breakpoint/src/BreakpointManager.php
@@ -54,6 +54,8 @@ class BreakpointManager extends DefaultPluginManager implements BreakpointManage
   protected $themeHandler;
 
   /**
+   * Static cache of breakpoints keyed by group.
+   *
    * @var array
    */
   protected $breakpointsByGroup;
@@ -196,10 +198,13 @@ public function clearCachedDefinitions() {
   }
 
   /**
+   * Gets the label for a breakpoint group.
+   *
    * @param string $group
+   *   The breakpoint group.
    *
    * @return string
-   *   The label
+   *   The label.
    */
   protected function getGroupLabel($group) {
     if ($this->moduleHandler->moduleExists($group)) {
diff --git a/core/themes/stark/stark.breakpoints.yml b/core/themes/stark/stark.breakpoints.yml
index 90a486a..d1cdd9b 100644
--- a/core/themes/stark/stark.breakpoints.yml
+++ b/core/themes/stark/stark.breakpoints.yml
@@ -15,4 +15,4 @@ stark.wide:
   mediaQuery: 'all and (min-width: 960px)'
   weight: 2
   multipliers:
-    - 1x
\ No newline at end of file
+    - 1x