[ErrorHandler] Fix rendered exception code highlighting on PHP 8.3

Author: tscni

ErrorRenderer/HtmlErrorRenderer.php

@@ -274,12 +274,10 @@ private function fileExcerpt(string $file, int $line, int $srcContext = 3): stri
             if (\PHP_VERSION_ID >= 80300) {
                 // remove main pre/code tags
                 $code = preg_replace('#^<pre.*?>\s*<code.*?>(.*)</code>\s*</pre>#s', '\\1', $code);
-                // split multiline code tags
-                $code = preg_replace_callback('#<code ([^>]++)>((?:[^<]*+\\n)++[^<]*+)</code>#', function ($m) {
-                    return "<code $m[1]>".str_replace("\n", "</code>\n<code $m[1]>", $m[2]).'</code>';
+                // split multiline span tags
+                $code = preg_replace_callback('#<span ([^>]++)>((?:[^<\\n]*+\\n)++[^<]*+)</span>#', function ($m) {
+                    return "<span $m[1]>".str_replace("\n", "</span>\n<span $m[1]>", $m[2]).'</span>';
                 }, $code);
-                // Convert spaces to html entities to preserve indentation when rendered
-                $code = str_replace(' ', '&nbsp;', $code);
                 $content = explode("\n", $code);
             } else {
                 // remove main code/span tags

Resources/assets/css/exception.css

@@ -242,7 +242,7 @@ header .container { display: flex; justify-content: space-between; }
 .trace-code li { color: #969896; margin: 0; padding-left: 10px; float: left; width: 100%; }
 .trace-code li + li { margin-top: 5px; }
 .trace-code li.selected { background: var(--trace-selected-background); margin-top: 2px; }
-.trace-code li code { color: var(--base-6); white-space: nowrap; }
+.trace-code li code { color: var(--base-6); white-space: pre; }
 
 .trace-as-text .stacktrace { line-height: 1.8; margin: 0 0 15px; white-space: pre-wrap; }