@ ProgramNode (location: (0...17))
├── locals: []
└── statements:
    @ StatementsNode (location: (0...17))
    └── body: (length: 1)
        └── @ RegularExpressionNode (location: (0...17))
            ├── opening_loc: (0...1) = "/"
            ├── content_loc: (1...16) = "[\\u0021-\\u0027]"
            ├── closing_loc: (16...17) = "/"
            ├── unescaped: "[!-']"
            └── flags: ∅
