add single curly braces delimiters

skip interpolation strings

Author: joeesteves

syntax/eelixir.vim

@@ -1,5 +1,5 @@
 if exists("b:current_syntax")
-  finish
+  " finish
 endif
 
 let s:cpo_save = &cpo
@@ -59,6 +59,8 @@ syn cluster eelixirRegions contains=eelixirBlock,surfaceExpression,eelixirExpres
 exe 'syn region  eelixirExpression matchgroup=eelixirDelimiter start="<%"  end="%\@<!%>" contains=@elixirTop  containedin=ALLBUT,@eelixirRegions keepend'
 exe 'syn region  eelixirExpression matchgroup=eelixirDelimiter start="<%=" end="%\@<!%>" contains=@elixirTop  containedin=ALLBUT,@eelixirRegions keepend'
 exe 'syn region  surfaceExpression matchgroup=surfaceDelimiter start="{{" end="}}" contains=@elixirTop  containedin=ALLBUT,@eelixirRegions keepend'
+exe 'syn region  surfaceExpression matchgroup=surfaceDelimiter start="{" end="}" contains=@elixirTop  containedin=ALLBUT,@eelixirRegions keepend'
+exe 'syn region  surfaceExpression matchgroup=surfaceDelimiter start="{" end="}" skip="#{[^}]*}" contains=@elixirTop  containedin=htmlValue keepend'
 exe 'syn region  eelixirQuote      matchgroup=eelixirDelimiter start="<%%" end="%\@<!%>" contains=@elixirTop  containedin=ALLBUT,@eelixirRegions keepend'
 exe 'syn region  eelixirComment    matchgroup=eelixirDelimiter start="<%#" end="%\@<!%>" contains=elixirTodo,@Spell containedin=ALLBUT,@eelixirRegions keepend'