Missing closing expression brace results in obscure error.

[damncabbage]

{
  bikeshed/modules/foo/bar
    "hi"
    "bye"

Produces:

Building site...Projector build errors:
Parse error:
  Unexpected end of input
  Expected one of: [hole, variable, list, case, lambda]

(This may be part Loom, part Projector.)

[thumphries]

This can probably be fixed by adding labels to all the paren / brace parsing rules in Parser.hs

Feel free to experiment with it

[thumphries]

This is bound to stay messy indefinitely because of the way the layout pass is implemented, it injects a bunch of parentheses that muddle up error reporting. at least it's an error!