Removes space after tag without description

fixes #86

src/DocBlock/Tags/Formatter/PassthroughFormatter.php

@@ -26,6 +26,6 @@ class PassthroughFormatter implements Formatter
      */
     public function format(Tag $tag)
     {
-        return '@' . $tag->getName() . ' ' . (string)$tag;
+        return trim('@' . $tag->getName() . ' ' . (string)$tag);
     }
 }

tests/unit/DocBlock/DescriptionTest.php

@@ -31,7 +31,7 @@ class DescriptionTest extends \PHPUnit_Framework_TestCase
     public function testDescriptionCanRenderUsingABodyWithPlaceholdersAndTags()
     {
         $body = 'This is a %1$s body.';
-        $expected = 'This is a {@internal significant } body.';
+        $expected = 'This is a {@internal significant} body.';
         $tags = [new Generic('internal', new Description('significant '))];
 
         $fixture = new Description($body, $tags);
@@ -41,7 +41,7 @@ class DescriptionTest extends \PHPUnit_Framework_TestCase
 
         // with a custom formatter
         $formatter = m::mock(PassthroughFormatter::class);
-        $formatter->shouldReceive('format')->with($tags[0])->andReturn('@internal significant ');
+        $formatter->shouldReceive('format')->with($tags[0])->andReturn('@internal significant');
         $this->assertSame($expected, $fixture->render($formatter));
     }
 
@@ -56,7 +56,7 @@ class DescriptionTest extends \PHPUnit_Framework_TestCase
     public function testDescriptionCanBeCastToString()
     {
         $body = 'This is a %1$s body.';
-        $expected = 'This is a {@internal significant } body.';
+        $expected = 'This is a {@internal significant} body.';
         $tags = [new Generic('internal', new Description('significant '))];
 
         $fixture = new Description($body, $tags);

tests/unit/DocBlock/Tags/Formatter/PassthroughFormatterTest.php

@@ -38,4 +38,21 @@ class PassthroughFormatterTest extends \PHPUnit_Framework_TestCase
             $fixture->format(new Generic('unknown-tag', new Description('This is a description')))
         );
     }
+
+    /**
+     * @covers ::format
+     * @uses \phpDocumentor\Reflection\DocBlock\Description
+     * @uses \phpDocumentor\Reflection\DocBlock\Tags\BaseTag
+     * @uses \phpDocumentor\Reflection\DocBlock\Tags\Generic
+     */
+    public function testFormatterToStringWitoutDescription()
+    {
+        $expected = '@unknown-tag';
+        $fixture = new PassthroughFormatter();
+
+        $this->assertSame(
+            $expected,
+            $fixture->format(new Generic('unknown-tag'))
+        );
+    }
 }