/// Default regex pattern for matching TODO-style tags in comments.
///
/// This pattern is inspired by the VSCode Todo Tree extension and matches tags
/// that appear after common comment markers.
///
/// Pattern breakdown:
/// - `(//|#|<!--|;|/\*|\*|--)` - Comment markers for most languages
/// - `\s*` - Optional whitespace after comment marker
/// - `($TAGS)` - The tag to match (placeholder, replaced at runtime)
/// - `(?:\(([^)]+)\))?` - Optional author in parentheses
/// - `:` - Required colon after tag
/// - `(.*)` - The message
///
/// Supported comment syntaxes:
/// ```text
/// // - C, C++, Java, JavaScript, TypeScript, Rust, Go, Swift, Kotlin
/// # - Python, Ruby, Shell, YAML, TOML
/// /* - C-style block comments
/// * - Block comment continuation lines
/// <!-- - HTML, XML, Markdown comments
/// -- - SQL, Lua, Haskell, Ada
/// ; - Lisp, Clojure, Assembly, INI files
/// % - LaTeX, Erlang, MATLAB, Prolog
/// """ - Python docstrings
/// ''' - Python docstrings
/// REM - Batch files
/// ```
///
/// Note: `::` was removed from default comment markers to prevent false positives
/// in Rust, C++, and other languages where `::` is used as a scope resolution operator
/// (e.g., `std::io::Error`).
pub const DEFAULT_REGEX: &str =
r#"(//|#|<!--|;|/\*|\*|--|%|"""|'''|REM\s)\s*($TAGS)(?:\(([^)]+)\))?:(.*)"#;