Twenty Twenty-One: Make text within code blocks readable in Dark Mode.

This change ensures that the primary text color specific to Dark Mode is used instead of the one specified for normal mode. The latter is not legible in Dark Mode.

Props slaFFik, poena, mukesh27, justinahinon.
Merges [49825] to the 5.6 branch.
Fixes #51985.
Built from https://develop.svn.wordpress.org/branches/5.6@49852


git-svn-id: http://core.svn.wordpress.org/branches/5.6@49571 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentytwentyone/assets/css/ie.css

@@ -2573,6 +2573,7 @@ input[type=reset]:hover {
 }
 
 .wp-block-code code {
+	color: #28303d;
 	font-size: 1rem;
 	white-space: pre;
 	overflow-x: auto;

wp-content/themes/twentytwentyone/assets/sass/05-blocks/code/_style.scss

@@ -6,6 +6,7 @@
 	padding: var(--global--spacing-unit);
 
 	code {
+		color: var(--global--color-primary);
 		font-size: var(--global--font-size-xs);
 		white-space: pre;
 		overflow-x: auto;

wp-content/themes/twentytwentyone/style-rtl.css

@@ -1870,6 +1870,7 @@ input[type=reset]:hover,
 }
 
 .wp-block-code code {
+	color: var(--global--color-primary);
 	font-size: var(--global--font-size-xs);
 	white-space: pre;
 	overflow-x: auto;

wp-content/themes/twentytwentyone/style.css

@@ -1880,6 +1880,7 @@ input[type=reset]:hover,
 }
 
 .wp-block-code code {
+	color: var(--global--color-primary);
 	font-size: var(--global--font-size-xs);
 	white-space: pre;
 	overflow-x: auto;

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.6.1-alpha-49851';
+$wp_version = '5.6.1-alpha-49852';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.