//! MLS Chapter 2: Lexical Structure
//!
//! This module tests conformance to MLS 3.7-dev Chapter 2, which defines:
//! - §2.1 Character Set
//! - §2.2 Comments
//! - §2.3 Identifiers, Names, and Keywords
//! - §2.4 Literals
//! - §2.5 Operator Symbols
//!
//! Reference: https://specification.modelica.org/master/lexicalstructure.html