line continuation has to be removed.

mattn · mattn · commit ff5dbc380b9f · 2014-05-15T13:16:57.000+09:00
diff --git a/syntax/cpp.vim b/syntax/cpp.vim
@@ -39,9 +39,7 @@ if !exists("cpp_no_cpp11")
   syn keyword cppExceptions	noexcept
   syn keyword cppStorageClass	constexpr decltype
   syn keyword cppConstant	nullptr
-  syn region cppRawString       matchgroup=cppRawDelimiter
-    \ start=+\%(u8\|[uLU]\)\=R"\z([[:alnum:]_{}[\]#<>%:;.?*\+\-/\^&|~!=,"']\{,16}\)(+
-    \ end=+)\z1"+ contains=@Spell
+  syn region cppRawString       matchgroup=cppRawDelimiter start=+\%(u8\|[uLU]\)\=R"\z([[:alnum:]_{}[\]#<>%:;.?*\+\-/\^&|~!=,"']\{,16}\)(+ end=+)\z1"+ contains=@Spell
 endif
 
 " The minimum and maximum operators in GNU C++
