Ticket #47580: 47580.2.diff

src/index.php

@@ -30 +30 @@
 wp_load_translations_early();
 
 // Die with an error message
-$die = __( 'You are running WordPress without JavaScript and CSS files. These need to be built.' ) . '</p>';
+$die = sprintf(
+        '<p>%s</p>',
+        __( 'You are running WordPress without JavaScript and CSS files. These need to be built.' )
+);
 
 $die .= '<p>' . sprintf(
         /* translators: %s: npm install */

src/wp-admin/css/common.css

@@ -460 +460 @@
         white-space: nowrap;
 }
 
+.wp-die-message {
+        font-size: 13px;
+        line-height: 1.5;
+        margin: 1em 0;
+}
+
 /* .widefat - main style for tables */
 .widefat {
         border-spacing: 0;

src/wp-includes/functions.php

@@ -3149 +3149 @@
                                 wp_list_pluck( $parsed_args['additional_errors'], 'message' )
                         );
                         $message = "<ul>\n\t\t<li>" . join( "</li>\n\t\t<li>", $message ) . "</li>\n\t</ul>";
-                } else {
-                        $message = "<p>$message</p>";
                 }
+
+                $message = sprintf(
+                        '<div class="wp-die-message">%s</div>',
+                        $message
+                );
         }
 
         $have_gettext = function_exists( '__' );
@@ -3221 +3224 @@
                 #error-page {
                         margin-top: 50px;
                 }
-                #error-page p {
+                #error-page p,
+                #error-page .wp-die-message {
                         font-size: 14px;
                         line-height: 1.5;
                         margin: 25px 0 20px;