Extended sniff to make sure there is one space before a curly (#27)

* Extended sniff to make sure there is one space before a curly

* Clarified message

src/Sniff/CurlySniff.php

@@ -28,6 +28,22 @@ public function process(File $file, int $stack_ptr): void
 
         $token = $file->get($stack_ptr);
 
+        // check the token before
+        if ($stack_ptr > 1) {
+            $before = $file->get($stack_ptr - 1);
+
+            if ($before->type !== Token::T_WHITESPACE || $before->chars !== ' ') {
+                $file->addViolation(
+                    self::class,
+                    'There must be one space before a curly bracket.',
+                    $token->lines[0],
+                    $token->offsets[0],
+                    $token->offsets[0] + strlen($token->chars)
+                );
+                return;
+            }
+        }
+
         // do we have one line?
         [
             $contains_returns,

test/Sniff/CurlySniffTest.php

@@ -56,6 +56,9 @@ public function testSniff()
             ),
             new Violation(CurlySniff::class, 'Media query should always be one multiple lines.', 36, 50, 51),
             new Violation(CurlySniff::class, 'Media query should always be one multiple lines.', 37, 52, 53),
+            new Violation(CurlySniff::class, 'There must be one space before a curly bracket.', 38, 6, 7),
+            new Violation(CurlySniff::class, 'There must be one space before a curly bracket.', 39, 8, 9),
+            new Violation(CurlySniff::class, 'There must be one space before a curly bracket.', 41, 1, 2),
         ], $file->getViolations());
     }
 }

test/Sniff/fixtures/curly.less

@@ -35,3 +35,7 @@
 }
 @media only screen and (min-device-width: 320px) {.bad {}}
 @media only screen and (min-device-width: @{size}) {.bad {}}
+.bad4{ color: #ffffff; }
+.bad5  { color: #ffffff; }
+.bad6
+{ color: #ffffff; }