updated core to 8.6.3

core/themes/seven/css/components/form.css

@@ -19,7 +19,7 @@ fieldset:not(.fieldgroup) {
  * @todo remove once this Mozilla bug is fixed.
  * See https://bugzilla.mozilla.org/show_bug.cgi?id=504622
  */
-@-moz-document url-prefix() {
+@media (min--moz-device-pixel-ratio: 0) {
   fieldset:not(.fieldgroup) {
     display: table-cell;
   }
@@ -41,7 +41,7 @@ fieldset:not(.fieldgroup) > legend {
  * @todo remove once this Mozilla bug is fixed.
  * See https://bugzilla.mozilla.org/show_bug.cgi?id=504622
  */
-@-moz-document url-prefix() {
+@media (min--moz-device-pixel-ratio: 0) {
   .fieldgroup {
     display: table-cell;
   }

core/themes/seven/css/components/tabs.css

@@ -59,7 +59,7 @@ li.tabs__tab {
   display: block;
   padding: 0;
 }
-/* This is required to win over specifity of [dir="rtl"] .tabs__tab */
+/* This is required to win over specificity of [dir="rtl"] .tabs__tab */
 [dir="rtl"] li.tabs__tab {
   padding-left: 0;
   padding-right: 0;
@@ -195,7 +195,7 @@ li.tabs__tab a {
 }
 [dir="rtl"] .is-horizontal .tabs__tab {
   float: right;
-  /* This is required to win over specifity of [dir="rtl"] .tabs > li */
+  /* This is required to win over specificity of [dir="rtl"] .tabs > li */
   margin-left: 0;
 }
 .is-horizontal .tabs__tab + .tabs__tab {
@@ -336,7 +336,7 @@ li.tabs__tab a {
   padding: 0;
 }
 /**
- * 1. This is required to win over specifity of
+ * 1. This is required to win over specificity of
  *      [dir="rtl"] .tabs.secondary .tabs__tab:hover,
  *      [dir="rtl"] .tabs.secondary .tabs__tab:focus
  */

core/themes/seven/css/components/views-ui.css

@@ -59,7 +59,7 @@ details.fieldset-no-legend {
 /* @group Dependent options
  */
 
-/* This is necessary to supercede the Seven .form-item
+/* This is necessary to supersede the Seven .form-item
  * reset declaration that sets the margin to zero.
  */
 .form-item-options-expose-required,