How to quote this on Ruby?

How to quote this on Ruby?

i have as string, with these value:
'`~!@#:;|$%^>?,)_+-={][&*(<]./"'
how to declare it on .rb without heredoc?
with heredoc:
bla = <<<_
'`~!@#:;|$%^>?,)_+-={][&*(<]./"'
_
bla.chop!