Add note to `File` rustdoc about `parse_file`.
@@ -3,6 +3,8 @@ use super::*;
ast_struct! {
/// A complete file of Rust source code.
///
+ /// Typically `File` objects are created with [`parse_file`].
+ ///
/// # Example
///
/// Parse a Rust source file into a `syn::File` and print out a debug
