(module print_float_whole_smoke
  (fn main
    (doc "RED pin for Gitea #7: a whole-valued Float (here, the literal 2.0) routed through polymorphic `print` (which monomorphises to Show Float.show -> float_to_str -> runtime/str.c::ailang_float_to_str -> libc snprintf %g) must render with a `.0` suffix, matching the surface printer's write_float_lit fallback (crates/ailang-surface/src/print.rs lines 624-637). The desired stdout for this fixture is the three bytes `2.0\\n`. Pre-fix, libc %g strips trailing zeros and renders `2\\n` — Int-shaped output for a Float value — which violates the surface-runtime round-trip-on-lex symmetry the language relies on.")
    (type (fn-type (params) (ret (own (con Unit))) (effects IO)))
    (params)
    (body (seq (app print 2.0) (do io/print_str "\n")))))