Minor Signature Incompatibilities

Author: oleibman

src/PhpWord/Writer/ODText.php

@@ -70,10 +70,8 @@ public function __construct(?PhpWord $phpWord = null)
 
     /**
      * Save PhpWord to file.
-     *
-     * @param string $filename
      */
-    public function save($filename = null): void
+    public function save(string $filename): void
     {
         $filename = $this->getTempFile($filename);
         $zip = $this->getZipArchive($filename);

src/PhpWord/Writer/RTF.php

@@ -56,10 +56,8 @@ public function __construct(?PhpWord $phpWord = null)
 
     /**
      * Save content to file.
-     *
-     * @param string $filename
      */
-    public function save($filename = null): void
+    public function save(string $filename): void
     {
         $this->writeFile($this->openFile($filename), $this->getContent());
     }

src/PhpWord/Writer/Word2007.php

@@ -91,10 +91,8 @@ public function __construct(?PhpWord $phpWord = null)
 
     /**
      * Save document by name.
-     *
-     * @param string $filename
      */
-    public function save($filename = null): void
+    public function save(string $filename): void
     {
         $filename = $this->getTempFile($filename);
         $zip = $this->getZipArchive($filename);