Sniffs: exclude space from prepareForOutput() in error messages

src/Standards/Generic/Sniffs/WhiteSpace/LanguageConstructSpacingSniff.php

@@ -113,7 +113,7 @@ public function process(File $phpcsFile, int $stackPtr)
             }
 
             $error = 'Language constructs must be followed by a single space; expected 1 space between YIELD FROM found "%s"';
-            $data  = [Common::prepareForOutput($found)];
+            $data  = [Common::prepareForOutput($found, [' '])];
 
             if ($hasComment === true) {
                 $phpcsFile->addError($error, $stackPtr, 'IncorrectYieldFromWithComment', $data);
@@ -139,8 +139,16 @@ public function process(File $phpcsFile, int $stackPtr)
         if ($tokens[($stackPtr + 1)]['code'] === T_WHITESPACE) {
             $content = $tokens[($stackPtr + 1)]['content'];
             if ($content !== ' ') {
-                $error = 'Language constructs must be followed by a single space; expected 1 space but found "%s"';
-                $data  = [Common::prepareForOutput($content)];
+                if (trim($content, ' ') === '') {
+                    // Only space characters: report the count.
+                    $found = $tokens[($stackPtr + 1)]['length'] . ' spaces';
+                } else {
+                    // Contains tabs or newlines: make them visible.
+                    $found = '"' . Common::prepareForOutput($content, [' ']) . '"';
+                }
+
+                $error = 'Language constructs must be followed by a single space; expected 1 space but found %s';
+                $data  = [$found];
                 $fix   = $phpcsFile->addFixableError($error, $stackPtr, 'IncorrectSingle', $data);
                 if ($fix === true) {
                     $phpcsFile->fixer->replaceToken(($stackPtr + 1), ' ');

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

@@ -280,7 +280,7 @@ public function processBracket(File $phpcsFile, int $openBracket)
                         $data[] = strlen($gap);
                     } else {
                         // Gap contains more than just spaces: render these for better clarity.
-                        $data[] = '"' . Common::prepareForOutput($gap) . '"';
+                        $data[] = '"' . Common::prepareForOutput($gap, [' ']) . '"';
                     }
 
                     $fix = $phpcsFile->addFixableError($error, $typeHintToken, 'SpacingAfterHint', $data);