minor symfony#20388 [Yaml] Clean some messages + add test case (nicolas-grekas)

This PR was merged into the 2.7 branch.

Discussion
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[Yaml] Clean some messages + add test case

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

Related to symfony#20335 on 3.2.

Commits
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7520f7b [Yaml] Clean some messages + add test case

Author: fabpot

src/Symfony/Component/Yaml/Inline.php

@@ -249,7 +249,7 @@ public static function parseScalar($scalar, $delimiters = null, $stringDelimiter
                 $output = $match[1];
                 $i += strlen($output);
             } else {
-                throw new ParseException(sprintf('Malformed inline YAML string (%s).', $scalar));
+                throw new ParseException(sprintf('Malformed inline YAML string: %s.', $scalar));
             }
 
             if ($evaluate) {
@@ -273,7 +273,7 @@ public static function parseScalar($scalar, $delimiters = null, $stringDelimiter
     private static function parseQuotedScalar($scalar, &$i)
     {
         if (!preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
-            throw new ParseException(sprintf('Malformed inline YAML string (%s).', substr($scalar, $i)));
+            throw new ParseException(sprintf('Malformed inline YAML string: %s.', substr($scalar, $i)));
         }
 
         $output = substr($match[0], 1, strlen($match[0]) - 2);
@@ -346,7 +346,7 @@ private static function parseSequence($sequence, &$i = 0, $references = array())
             ++$i;
         }
 
-        throw new ParseException(sprintf('Malformed inline YAML string %s', $sequence));
+        throw new ParseException(sprintf('Malformed inline YAML string: %s.', $sequence));
     }
 
     /**
@@ -434,7 +434,7 @@ private static function parseMapping($mapping, &$i = 0, $references = array())
             }
         }
 
-        throw new ParseException(sprintf('Malformed inline YAML string %s', $mapping));
+        throw new ParseException(sprintf('Malformed inline YAML string: %s.', $mapping));
     }
 
     /**

src/Symfony/Component/Yaml/Tests/InlineTest.php

@@ -401,4 +401,13 @@ public function getTestsForDump()
             array('{ foo: { bar: { 1: 2, baz: 3 } } }', array('foo' => array('bar' => array(1 => 2, 'baz' => 3)))),
         );
     }
+
+    /**
+     * @expectedException \Symfony\Component\Yaml\Exception\ParseException
+     * @expectedExceptionMessage Malformed inline YAML string: {this, is not, supported}.
+     */
+    public function testNotSupportedMissingValue()
+    {
+        Inline::parse('{this, is not, supported}');
+    }
 }