spacevim/bundle/nvim-treesitter/tests/query/highlights/hocon/test.conf

HOCON = Human-Optimized Config Object Notation
// ^field
//        ^string
//                       ^string
//                              ^string
//                                    ^string

"it's": "a JSON\nsuperset",
//       ^string
//             ^string.escape
//                        ^punctuation.delimiter

features: [
//      ^operator
//        ^punctuation.bracket
    less noisy / less pedantic syntax
//             ^string
    ability to refer to another part of the configuration
    import/include another configuration file into the current file
    a mapping to a flat properties list such as Java's system properties
    ability to get values from environment variables
    # ability to write comments
//  ^comment
//     ^comment
    // this is also a comment 
//  ^comment
//     ^comment
]

specs url: "https://github.com/lightbend/config/blob/master/HOCON.md"
includes: { 
  include required(file("~/prog/tree-sitter-hocon/grammar.js")) 
//         ^keyword
//^include
//                ^punctuation.bracket
//                                                           ^punctuation.bracket
  override = true
//            ^boolean
}

it's: ${it's}. A ${HOCON}
//    ^punctuation.special
//     ^punctuation.special
//          ^punctuation.special
//           ^string
//             ^string
//                ^punctuation.special
//                      ^punctuation.special

this.is.a."long.key" = null,
//  ^punctuation.delimiter
//     ^punctuation.delimiter
//       ^punctuation.delimiter
//                      ^constant.builtin
week  = 7 days 
//      ^number
//         ^keyword