bug#6286: General delimited literals in ruby-mode patch

[Dmitry Gutov]

Hi again,

I missed the byte compilation error, arising from the fact that 
`syntax-propertize-rules` evaluates regular expressions at compile time.

Options:
1) Remove customizability (see attached patch).
2) Regexp matches any method, then we check against the whitelist in a 
new function.

-- Dmitry

0003-lisp-progmodes-ruby-mode.el-Fix-byte-compilation-err.patch
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