Fix typo in error message

[jkutner]

No description provided.

[jkutner]

This could be a problem for warbler's runnable feature, which uses file: path for jruby home :/

[mkristian]

@jkutner did you see the error message on warbler ? if so there is no problem to remove this message IMO

[jkutner]

@mkristian it seemed to "work" with the file:/path/to/jar/... prefix. But I was able to remove the warning by replace it with uri:classloader:!/META-INF/...

I say "work" because I'm stuck against another problem where Gem::Specification is returning uri:classloader:... for the executable script, but RubyInstanceConfig.getScriptSource() doesn't handle it.

[mkristian]

I am happy to see that "uri:classloader:" works everywhere. but I am not sure where and how this RubyInstanceConfig.getScriptSource(). could give me a bit more input. maybe we should continue this on new issue or so

[jkutner]

here: #2876