[CLEANUP] Avoid Hungarian notation for anchor (#1068)

Part of #756

Author: oliverklee

src/Value/URL.php

@@ -38,7 +38,7 @@ public function __construct(CSSString $oURL, $lineNumber = 0)
      */
     public static function parse(ParserState $parserState): URL
     {
-        $oAnchor = $parserState->anchor();
+        $anchor = $parserState->anchor();
         $identifier = '';
         for ($i = 0; $i < 3; $i++) {
             $sChar = $parserState->parseCharacter(true);
@@ -52,7 +52,7 @@ public static function parse(ParserState $parserState): URL
             $parserState->consumeWhiteSpace();
             $parserState->consume('(');
         } else {
-            $oAnchor->backtrack();
+            $anchor->backtrack();
         }
         $parserState->consumeWhiteSpace();
         $result = new URL(CSSString::parse($parserState), $parserState->currentLine());

src/Value/Value.php

@@ -120,11 +120,11 @@ public static function parseValue(ParserState $parserState, array $listDelimiter
      */
     public static function parseIdentifierOrFunction(ParserState $parserState, $ignoreCase = false)
     {
-        $oAnchor = $parserState->anchor();
+        $anchor = $parserState->anchor();
         $result = $parserState->parseIdentifier($ignoreCase);
 
         if ($parserState->comes('(')) {
-            $oAnchor->backtrack();
+            $anchor->backtrack();
             if ($parserState->streql('url', $result)) {
                 $result = URL::parse($parserState);
             } elseif (