From: William Desportes <williamdes@wdes.fr>
Date: Fri, 11 Apr 2025 16:08:22 +0200
Subject: Fix trim() null param is deprecated

4 tests triggered 1 PHP deprecation:

1) php-spyc/Spyc.php:353
trim(): Passing null to parameter #1 ($string) of type string is deprecated

Triggered by:

* DumpTest::testDump
  php-spyc/tests/DumpTest.php:17

* DumpTest::testDumpWithQuotes
  php-spyc/tests/DumpTest.php:26

* DumpTest::testNull
  php-spyc/tests/DumpTest.php:43

* RoundTripTest::testNull
  php-spyc/tests/RoundTripTest.php:11
---
 Spyc.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Spyc.php b/Spyc.php
index 3fe0f62..24be0a3 100644
--- a/Spyc.php
+++ b/Spyc.php
@@ -350,7 +350,7 @@ class Spyc {
     if (self::isTranslationWord($value)) {
       $value = $this->_doLiteralBlock($value, $indent);
     }
-    if (trim ($value) != $value)
+    if ($value !== null && trim ($value) != $value)
        $value = $this->_doLiteralBlock($value,$indent);
 
     if (is_bool($value)) {