fix: wrong visual tabSize on browser

"  " gives wrong visual result sometimes.

Signed-off-by: Jack Cherng <jfcherng@gmail.com>

Author: jfcherng

example/demo_base.php

@@ -39,9 +39,9 @@
     'showHeader' => true,
     // the frontend HTML could use CSS "white-space: pre;" to visualize consecutive whitespaces
     // but if you want to visualize them in the backend with " ", you can set this to true
-    'spacesToNbsp' => false,
+    'spacesToNbsp' => true,
     // HTML renderer tab width (negative = do not convert into spaces)
-    'tabSize' => 4,
+    'tabSize' => 8,
     // this option is currently only for the Combined renderer.
     // it determines whether a replace-type block should be merged or not
     // depending on the content changed ratio, which values between 0 and 1.

example/new_file.txt

@@ -7,7 +7,7 @@ Just a context separator. 1
 M
 N
 Do you know in Japanese, "魚の缶詰" means fish can.
-	  	Tab visualization test.
+a  Tab visualization test.
 G
 Say hello to my neighbors.
 A

example/old_file.txt

@@ -6,7 +6,7 @@ Just a context separator. 1
 M
 N
 Do you know in Chinese, "金槍魚罐頭" means tuna can.
-	  	Tab visualization test.
+a 	 Tab visualization test.
 G
 // remember to delete this line
 Say hello to my neighbors.

src/Renderer/Html/AbstractHtml.php

@@ -312,15 +312,7 @@ protected function htmlSafe(string $string): string
      */
     protected function htmlFixSpaces(string $string): string
     {
-        return preg_replace_callback(
-            '/ {2,}/S', // only fix for more than 1 space
-            static function (array $matches): string {
-                $count = \strlen($matches[0]);
-
-                return str_repeat('  ', $count >> 1) . ($count & 1 ? ' ' : '');
-            },
-            $string,
-        );
+        return str_replace(' ', ' ', $string);
     }
 
     /**