remove trailing in printer

Author: TomasVotruba

lib/PhpParser/PrettyPrinterAbstract.php

@@ -765,7 +765,13 @@ protected function p(
             $pos = $subEndPos + 1;
         }
 
-        $result .= $this->origTokens->getTokenCode($pos, $endPos + 1, $indentAdjustment);
+        $tokenCode = $this->origTokens->getTokenCode($pos, $endPos + 1, $indentAdjustment);
+        if ($node instanceof Expr\CallLike && $node->isFirstClassCallable()) {
+            $tokenCode = trim($tokenCode, ',');
+        }
+
+        $result .= $tokenCode;
+
         return $result;
     }
 

test/code/formatPreservation/args_to_variadic_remove_trailing_comma.test

@@ -0,0 +1,18 @@
+Replace args with VariadicPlaceholder should remove trailing comma
+-----
+<?php
+strlen(
+    'test',
+);
+
+strlen('another',);
+-----
+$stmts[0]->expr->args = [new Node\VariadicPlaceholder()];
+$stmts[1]->expr->args = [new Node\VariadicPlaceholder()];
+-----
+<?php
+strlen(
+    ...
+);
+
+strlen(...);