Update latex, html, ruby, c, cpp

syntax/cpp.vim

@@ -39,6 +39,9 @@ if !exists("cpp_no_cpp11")
   syn keyword cppExceptions	noexcept
   syn keyword cppStorageClass	constexpr decltype
   syn keyword cppConstant	nullptr
+  " A C++11 raw-string literal. It tries to follow 2.14.5 and 2.14.5.2 of the
+  " standard.
+  syn region cppRawString matchgroup=cppRawDelim start=+\%(u8\=\|[LU]\)\=R"\z(\%([ ()\\\d9-\d12]\@![\d0-\d127]\)\{,16}\)(+ end=+)\z1"+ contains=@Spell
 endif
 
 " The minimum and maximum operators in GNU C++
@@ -62,6 +65,8 @@ if version >= 508 || !exists("did_cpp_syntax_inits")
   HiLink cppStructure		Structure
   HiLink cppBoolean		Boolean
   HiLink cppConstant		Constant
+  HiLink cppRawDelim		cFormat
+  HiLink cppRawString		String
   delcommand HiLink
 endif