Vscode-ruby: Wiggly heredoc support

[adaedra]

Your environment

• vscode-ruby version: 0.10.4
• Ruby version: 2.3.0 (Although VS Code use by default system 2.0.0)
• VS Code version: 1.8.1
• Operating System: macOS Sierra
• Hardware (optional):

Wiggly heredocs are not working with the extension's syntax coloring.

Expected behavior

Wiggly heredocs are colored correctly, like in VS Code default Ruby syntax (Ruby extension disabled):

Actual behavior

Wiggly heredocs are not recognized. Futhermore, having unbalanced quotes in the heredoc breaks completely the syntax coloring for the rest of the file.

Steps to reproduce the problem

Open a ruby file containing a wiggly heredoc, e.g.:

<<~EOF
I'm heredoc!
EOF

(Ironically, GitHub suffers from the same bug, so the snippet is incorrectly colored)

[jtgrenz]

This seems to still be broken, or maybe it broke again?

Your environment

• vscode-ruby version: 0.17.0 (March 4 2018)
• Ruby version: 2.4.3 (when I run ruby --version as a custom task in cscode, I get ruby 2.3.3p222 (2016-11-21 revision 56859) [universal.x86_64-darwin17], so maybe vscode is using a differnet version)
• VS Code version: 1.21.1
• Operating System: macOS High Sierra