Try to fix warnings to escape '@' as '\@'. [-Wdocumentation-html]
Try to fix warnings to escape '@' as '\@'. [-Wdocumentation-html]

  clang/include/clang/Format/Format.h:185:8: error: HTML tag 'tt' requires an end tag [-Werror,-Wdocumentation-html]
    /// <tt>@property (readonly)</tt> instead of <tt>@property(readonly)</tt>.
        ~^~~

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@206893 91177308-0d34-0410-b5e6-96231b3b80d8

apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang