2013/10/8 mame (Yusuke Endoh) <mame / tsg.ne.jp>:
> Issue #8976 has been updated by mame (Yusuke Endoh).
>
> "...".dup looks too verbose to me.
> How about using "..." for a mutable string and '...' for an immutable?

I considered it at first.
But we (at the meeting) abondoned it because
we want to use escape sequences, such as \n, in immutable strings.

I wrote this concern in [ruby-core:57574] as follows.

| Note that the directive effects all static string literals regardless of
| single quotes, double quotes, %q-string, %qq-string and here documents.
| The reason that the directive is effective not only single quotes is
| we want to use escape sequences such as \n in frozen string literals.
-- 
Tanaka Akira