Bundled Themes: Typo corrections in various themes docblocks.

Props shailu25.
Fixes #60268.
See #59651.





git-svn-id: https://develop.svn.wordpress.org/trunk@57300 602fd350-edb4-49c9-b593-d223f7449a82

Author: audrasjb

src/wp-content/themes/twentyfifteen/css/editor-blocks.css

@@ -803,7 +803,7 @@ p.has-drop-cap:not(:focus)::first-letter {
 	}
 }
 
-/* Seperator */
+/* Separator */
 
 .wp-block-separator {
 	max-width: 100px;

src/wp-content/themes/twentynineteen/inc/color-patterns.php

@@ -72,8 +72,8 @@ function twentynineteen_custom_colors_css() {
 		 * Set background for:
 		 * - featured image :before
 		 * - featured image :before
-		 * - post thumbmail :before
-		 * - post thumbmail :before
+		 * - post thumbnail :before
+		 * - post thumbnail :before
 		 * - Submenu
 		 * - Sticky Post
 		 * - buttons

src/wp-content/themes/twentysixteen/css/blocks.css

@@ -292,7 +292,7 @@ p.has-drop-cap:not(:focus)::first-letter {
 	outline-offset: -4px;
 }
 
-/* Seperator */
+/* Separator */
 
 hr.wp-block-separator {
 	border: 0;