omit a file from testing

brag/brag/info.rkt

@@ -4,3 +4,4 @@
 (define scribblings '(("brag.scrbl")))
 (define blurb '("brag: the Beautiful Racket AST Generator. A fork of Danny Yoo's ragg. A design goal is to be easy for beginners to use. Given a grammar in EBNF, brag produces a parser that generates Racket's native syntax objects with full source location."))
 (define deps (list))
+(define test-omit-paths '("examples/simple-line-drawing/examples/letter-i.rkt"))