Add tuples, maps, and structs to elixirArguments

Author: sodapopcan

syntax/elixir.vim

@@ -88,7 +88,7 @@ syn match elixirString             "\(\w\)\@<!?\%(\\\(x\d{1,2}\|\h{1,2}\h\@!\>\|
 syn region elixirBlock              matchgroup=elixirBlockDefinition start="\<do\>:\@!" end="\<end\>" contains=ALLBUT,@elixirNotTop fold
 syn region elixirAnonymousFunction  matchgroup=elixirBlockDefinition start="\<fn\>"     end="\<end\>" contains=ALLBUT,@elixirNotTop fold
 
-syn region elixirArguments start="(" end=")" contained contains=elixirOperator,elixirAtom,elixirPseudoVariable,elixirAlias,elixirBoolean,elixirVariable,elixirUnusedVariable,elixirNumber,elixirDocString,elixirAtomInterpolated,elixirRegex,elixirString,elixirStringDelimiter,elixirRegexDelimiter,elixirInterpolationDelimiter,elixirSigil,elixirAnonymousFunction,elixirComment,elixirCharList,elixirCharListDelimiter
+syn region elixirArguments start="(" end=")" contained contains=elixirOperator,elixirAtom,elixirMap,elixirStruct,elixirTuple,elixirPseudoVariable,elixirAlias,elixirBoolean,elixirVariable,elixirUnusedVariable,elixirNumber,elixirDocString,elixirAtomInterpolated,elixirRegex,elixirString,elixirStringDelimiter,elixirRegexDelimiter,elixirInterpolationDelimiter,elixirSigil,elixirAnonymousFunction,elixirComment,elixirCharList,elixirCharListDelimiter
 
 syn match elixirDelimEscape "\\[(<{\[)>}\]/\"'|]" transparent display contained contains=NONE