Testing for the acceptance of `\|' in string literals:
Accepted as equivalent to |: Gauche, MIT, Gambit, Chicken, Bigloo, Kawa, Chibi, SCM, Larceny, STklos, Shoe, Dream, BDC, Rep, UMB, VX, Oaklisp, Llava, Sizzle, FemtoLisp, Dfsch
Not equivalent: Schemik
Lexical syntax error: Racket, Scheme48/scsh, Guile, Vicare, Ypsilon, Mosh, NexJ, KSi, SigScheme, Scheme 9, S7, SXM, Spark, Inlab, Owl Lisp
Lexer gets confused: Chez, IronScheme
Could not figure out how to test: TinyScheme