Expand detection of falsy functions to add getcwd

The documentation for getcwd states:
“Returns the current working directory on success, or FALSE on failure.”

Support detection for “on failure” in addition to “on error”.

Author: kasperg

generator/src/DocPage.php

@@ -31,6 +31,9 @@ public function detectFalsyFunction(): bool
             if (preg_match('/&false;\s+on\s+error/m', $file)) {
                 return true;
             }
+            if (preg_match('/&false;\s+on\s+failure/m', $file)) {
+                return true;
+            }
             if (preg_match('/&false;\s+if\s+an\s+error\s+occurred/m', $file)) {
                 return true;
             }