[run-tests.php] Combine multiple str_replace calls to a single strtr call

Makes the replacement easier to see, neatly aligned, and only takes one function call.
This is safe because none of the combined replacement values contain tokens that would be recursively replaced.

This also improves the readability on how the regular expressions in `EXPECTF` matcher is constructed.

Co-authored-by: Michael Voříšek <mvorisek@mvorisek.cz>

Author: Ayesh

run-tests.php

@@ -2567,21 +2567,23 @@ function run_test(string $php, $file, array $env): string
             $wanted_re = $temp;
 
             // Stick to basics
-            $wanted_re = str_replace('%e', '\\' . DIRECTORY_SEPARATOR, $wanted_re);
-            $wanted_re = str_replace('%s', '[^\r\n]+', $wanted_re);
-            $wanted_re = str_replace('%S', '[^\r\n]*', $wanted_re);
-            $wanted_re = str_replace('%a', '.+', $wanted_re);
-            $wanted_re = str_replace('%A', '.*', $wanted_re);
-            $wanted_re = str_replace('%w', '\s*', $wanted_re);
-            $wanted_re = str_replace('%i', '[+-]?\d+', $wanted_re);
-            $wanted_re = str_replace('%d', '\d+', $wanted_re);
-            $wanted_re = str_replace('%x', '[0-9a-fA-F]+', $wanted_re);
-            $wanted_re = str_replace('%f', '[+-]?(?:\d+|(?=\.\d))(?:\.\d+)?(?:[Ee][+-]?\d+)?', $wanted_re);
-            $wanted_re = str_replace('%c', '.', $wanted_re);
-            $wanted_re = str_replace('%0', '\x00', $wanted_re);
-        }
-
-        if (preg_match("/^$wanted_re\$/s", $output)) {
+            $wanted_re = strtr($wanted_re, [
+                '%e' => preg_quote(DIRECTORY_SEPARATOR, '/'),
+                '%s' => '[^\r\n]+',
+                '%S' => '[^\r\n]*',
+                '%a' => '.+',
+                '%A' => '.*',
+                '%w' => '\s*',
+                '%i' => '[+-]?\d+',
+                '%d' => '\d+',
+                '%x' => '[0-9a-fA-F]+',
+                '%f' => '[+-]?(?:\d+|(?=\.\d))(?:\.\d+)?(?:[Ee][+-]?\d+)?',
+                '%c' => '.',
+                '%0' => '\x00',
+            ]);
+        }
+
+        if (preg_match('/^' . $wanted_re . '$/s', $output)) {
             $passed = true;
         }
     } else {