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   110 implicit def sring_inters(sc: StringContext) = new { | 
   110 implicit def sring_inters(sc: StringContext) = new { | 
   111     def i(args: Any*): String = "   " ++ sc.s(args:_*) ++ "\n"  | 
   111     def i(args: Any*): String = "   " ++ sc.s(args:_*) ++ "\n"  | 
   112     def l(args: Any*): String = sc.s(args:_*) ++ ":\n"  | 
   112     def l(args: Any*): String = sc.s(args:_*) ++ ":\n"  | 
   113 }  | 
   113 }  | 
   114   | 
   114   | 
   115 // this allows you to write things like  | 
   115 // this allows us to write things like  | 
   116 // i"add" and l"Label"  | 
   116 // i"add" and l"Label"  | 
   117   | 
   117   | 
   118   | 
   118   | 
   119 // environments   | 
   119 // environments   | 
   120 type Env = Map[String, Int]  | 
   120 type Env = Map[String, Int]  |