CS: no unnecessary heredocs

Author: jrfnl

phpcs.xml.dist

@@ -59,6 +59,7 @@
     <rule ref="Squiz.Scope.MethodScope"/>
     <rule ref="Squiz.Strings.ConcatenationSpacing"/>
     <rule ref="Squiz.Strings.DoubleQuoteUsage.NotRequired"/>
+    <rule ref="Generic.Strings.UnnecessaryHeredoc"/>
     <rule ref="Squiz.WhiteSpace.ControlStructureSpacing"/>
     <rule ref="Squiz.WhiteSpace.FunctionClosingBraceSpace"/>
     <rule ref="Squiz.WhiteSpace.FunctionSpacing"/>

tests/Core/Tokenizers/Tokenizer/ReplaceTabsInTokenMiscTest.php

@@ -33,7 +33,7 @@ public function testTabWidthNotSet()
         $config  = new ConfigDouble();
         $ruleset = new Ruleset($config);
 
-        $content   = <<<EOD
+        $content   = <<<'EOD'
 <?php
 		echo 'foo';
 EOD;
@@ -71,7 +71,7 @@ public function testLengthSettingRespectsEncoding()
         $config->tabWidth = 4;
         $ruleset          = new Ruleset($config);
 
-        $content   = <<<EOD
+        $content   = <<<'EOD'
 <?php
 echo 'пасха		пасха';
 EOD;