Merge branch '2.8' into 3.2

* 2.8:
  fixed tests
  revert typo fix
  [Form] Fix ChoiceType to ensure submitted data is not nested unnecessarily
  Test inline styles with non-decorated formatter
  Fix RuntimeException when an Emacs buffer is modified
  [Yaml] add tests for specific mapping keys

Author: fabpot

Tests/InlineTest.php

@@ -698,4 +698,15 @@ public function testOmittedMappingKeyIsParsedAsColon()
     {
         $this->assertSame(array(':' => 'foo'), Inline::parse('{: foo}'));
     }
+
+    public function testBooleanMappingKeysAreConvertedToStrings()
+    {
+        $this->assertSame(array('false' => 'foo'), Inline::parse('{false: foo}'));
+        $this->assertSame(array('true' => 'foo'), Inline::parse('{true: foo}'));
+    }
+
+    public function testTheEmptyStringIsAValidMappingKey()
+    {
+        $this->assertSame(array('' => 'foo'), Inline::parse('{ "": foo }'));
+    }
 }