fix argument in function to speak

src/Espeak.php

@@ -6,6 +6,8 @@
 
 class Espeak
 {
+    use QuoteStringTrait;
+
     private InputOptions $inputOptions;
     public function __construct()
     {
@@ -34,7 +36,7 @@ public function execute(string $argument = ''): string
         }
         $cmd = 'espeak-ng' . $options;
         if (strlen($argument) > 0) {
-            $cmd .= ' ' . $argument;
+            $cmd .= ' ' . $this->quoteString($argument);
         }
         $output = \shell_exec($cmd);
         return $output;

src/InputOptions.php

@@ -6,6 +6,8 @@
 
 class InputOptions implements Stringable
 {
+    use QuoteStringTrait;
+
     private array $options = [];
     public function setOption(string $name, ?string $value = null)
     {
@@ -17,15 +19,6 @@ public function hasOption(string $name)
         return array_key_exists($name, $this->options);
     }
 
-    private function quoteString(string $value): string
-    {
-        $value = str_replace('"', '\"', $value);
-        if (str_contains($value, ' ')) {
-            $value = '"' . $value . '"';
-        }
-        return $value;
-    }
-
     private function nameValueToString(string $name, array $values, string $separator, string $type)
     {
         $return = [];

src/QuoteStringTrait.php

@@ -0,0 +1,15 @@
+<?php
+
+namespace Libresign\Espeak;
+
+trait QuoteStringTrait
+{
+    public function quoteString(string $value): string
+    {
+        $value = str_replace('"', '\"', $value);
+        if (str_contains($value, ' ')) {
+            $value = '"' . $value . '"';
+        }
+        return $value;
+    }
+}