Renamed this error code because the code didn't reflect the error at all

Author: gsherwood

package.xml

@@ -104,6 +104,7 @@ http://pear.php.net/dtd/package-2.0.xsd">
   - Squiz.Commenting.BlockComment no longer requires blank line before comment if it's the first content after the PHP open tag
     -- Thanks to Juliette Reinders Folmer for the patch
   - Squiz.Functions.FunctionDeclarationArgumentSpacing now has more accurate error messages
+    -- This includes renaming the SpaceAfterDefault error code to SpaceAfterEquals, which reflects the real error
   - Squiz.Functions.FunctionDeclarationArgumentSpacing now checks for no space after a reference operator
     -- If you don't want this new behaviour, exclude the SpacingAfterReference error message in a ruleset.xml file
   - Squiz.Functions.FunctionDeclarationArgumentSpacing now checks for no space after a variadic operator

src/Standards/Squiz/Sniffs/Functions/FunctionDeclarationArgumentSpacingSniff.php

@@ -213,7 +213,7 @@ public function processBracket($phpcsFile, $openBracket)
                         $spacesAfter,
                     ];
 
-                    $fix = $phpcsFile->addFixableError($error, $equalToken, 'SpaceAfterDefault', $data);
+                    $fix = $phpcsFile->addFixableError($error, $equalToken, 'SpaceAfterEquals', $data);
                     if ($fix === true) {
                         $padding = str_repeat(' ', $this->equalsSpacing);
                         if ($spacesAfter === 0) {