[Geiser-users] Error with C-x C-e at (values)

[Diogo F. S. Ramos]

1. Open a Racket file
2. Write `(values)'
3. Position cursor after `(values)' and press C-x C-e
4. "Error: retort-syntax"

`(values)' is a valid procedure call in Racket but C-x C-e doesn't like
it.  It works at the REPL.

Some investigation lead me to `geiser-con--req-form'.  It tries to match
against `answer' with a white space in the end of the regexp, but as
`(values)' doesn't return anything, it fails.