ListFormat validates patterns before passing them to MessageFormat, but it
currently allows single quotes as is. MessageFormat interprets these as
escaping syntax, which can lead to incorrect output. For example, given the end
pattern `"{0}'{1}'"` and an empty two pattern, a `ListFormat` formats
`List.of("foo", "bar")` as `"foo{1}"` instead of `"foo'bar'"`.
This behavior violates the specification, as ListFormat does not define any
escaping mechanisms. This PR converts ListFormat patterns to the corresponding
MessageFormat pattern by ensuring all single quotes are doubled, such that they
are always treated literally by the MessageFormat. I intentionally handle the
replacement logic at the MessageFormat creation site instead of the existing
ListFormat validation, because the patterns should remain exactly the same as
the input given by the user.
I am treating this as a normal bug fix since the current behavior violates the
specification and is incorrect. No one should be relying on this type of
behavior. However, I can file a CSR if deemed necessary.
---------
- [x] I confirm that I make this contribution in accordance with the [OpenJDK
Interim AI Policy](https://openjdk.org/legal/ai).
-------------
Commit messages:
- init
Changes: https://git.openjdk.org/jdk/pull/31430/files
Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31430&range=00
Issue: https://bugs.openjdk.org/browse/JDK-8386200
Stats: 36 lines in 2 files changed: 29 ins; 0 del; 7 mod
Patch: https://git.openjdk.org/jdk/pull/31430.diff
Fetch: git fetch https://git.openjdk.org/jdk.git pull/31430/head:pull/31430
PR: https://git.openjdk.org/jdk/pull/31430
