Nested string inside `` in javascript

[Fuco1]

If we have a string in backquotes like so

const a = `foo "bar" baz`

The parsing of the inner "bar" is broken. This seems to be because both the backtick AND quote has string syntax. I have no idea how this is even possible in Emacs... syntax-ppss always reports to be inside the backtick-quoted string even if inside the quote-string (it probably ignores nested delimiters and only looks for the one that is marked in the beginning).

This is not covered in sp-get-string and related logic.

Expected behavior

The inner string should be parsed as sexp

Actual behavior

The inner string is not parsed as sexp

Environment & version information

• smartparens version: 20171021.718
• Active major-mode: js2-mode
• Emacs version (M-x emacs-version): GNU Emacs 25.2.1 (x86_64-unknown-linux-gnu) of 2017-10-25
• Spacemacs/Evil/Other starterkit (specify which)/Vanilla: vanilla
• OS: gnu/linux

[Fuco1]

This works fine now, we just need to add a test case.