Code tidy

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

Author: jfcherng

src/Renderer/AbstractRenderer.php

@@ -8,7 +8,7 @@
 use Jfcherng\Diff\Utility\Language;
 
 /**
- * Abstract class for diff renderers.
+ * Base class for diff renderers.
  */
 abstract class AbstractRenderer implements RendererInterface
 {

src/Renderer/Html/AbstractHtml.php

@@ -12,7 +12,7 @@
 use Jfcherng\Utility\MbString;
 
 /**
- * Base renderer for rendering HTML based diffs.
+ * Base renderer for rendering HTML-based diffs.
  */
 abstract class AbstractHtml extends AbstractRenderer
 {
@@ -137,8 +137,8 @@ protected function renderChangedExtent(AbstractLineRenderer $lineRenderer, strin
     {
         static $mbFrom, $mbTo;
 
-        $mbFrom = $mbFrom ?? new MbString('', 'UTF-8');
-        $mbTo = $mbTo ?? new MbString('', 'UTF-8');
+        $mbFrom = $mbFrom ?? new MbString();
+        $mbTo = $mbTo ?? new MbString();
 
         $mbFrom->set($from);
         $mbTo->set($to);
@@ -243,7 +243,7 @@ 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
+            '/ {2,}/S', // only fix for more than 1 space
             function (array $matches): string {
                 $count = \strlen($matches[0]);
 

src/Renderer/Html/LineRenderer/AbstractLineRenderer.php

@@ -6,6 +6,9 @@
 
 use Jfcherng\Diff\SequenceMatcher;
 
+/**
+ * Base renderer for rendering HTML-based line diffs.
+ */
 abstract class AbstractLineRenderer implements LineRendererInterface
 {
     /**

src/Renderer/RendererConstant.php

@@ -25,7 +25,7 @@ final class RendererConstant
     /**
      * The delimiter to be used as the glue in string/array functions.
      *
-     * this delimiter contains chars from the Unicode reserved areas
+     * this delimiter contains chars from the 15-16th Unicode reserved areas
      * hopefully, it won't appear in our lines
      *
      * @var string

src/Renderer/Text/AbstractText.php

@@ -6,6 +6,9 @@
 
 use Jfcherng\Diff\Renderer\AbstractRenderer;
 
+/**
+ * Base renderer for rendering text-based diffs.
+ */
 abstract class AbstractText extends AbstractRenderer
 {
     /**