Correct order of iterating with_prototypes.

When I first wrote that code I assumed that prototypes were used from top to
bottom but I tested it and it's actually bottom to top.

This reduces the number of failing ASP tests but increases the number of
failing PHP tests. I expect the new PHP failures might just be exposing
another bug.

src/parsing/parser.rs

@@ -129,7 +129,7 @@ impl ParseState {
                 ctx_ref.prototype.clone()
             };
             let context_chain = self.stack
-                .iter().rev() // iterate the stack in top-down order to apply the prototypes
+                .iter() // Sublime applies with_prototypes from bottom to top
                 .filter_map(|lvl| lvl.prototype.as_ref().cloned())
                 .chain(prototype.into_iter())
                 .chain(Some(cur_level.context.clone()).into_iter());