[Le #152] Fix case of spec error printing where erroneously passing no arguments causes bad formatting

[stanislowskij]

⚠️ Imported from legacy repository. This issue is a duplicate of Clojure-Intro-Course/babel-legacy#152.

Small issue, but with babel-spec'd functions in the core library that require multiple arguments, e.g. reduce, take, map, ..., the modified exception output adds an extra space after the function name in the description of the error.

Example:

babel.middleware=> (map)
Wrong number of arguments in (map ): the function map expects one or more arguments but was given no arguments.

This is probably fixable with a simple if block in processor/babel-spec-message, but I am sure this issue is present in different cases where the exception is modified, I just haven't checked yet.