Docstring comes out in expansion of defmacro!

[gilch]

Macros defined with defmacro! put too much in the expansion. This isn't obvious unless you have --spy on or use disassemble. I also see a lot of Nones for some reason. It seems to be the result of each form in the defmacro! definition, instead of just the final one.

=> (defmacro! foo [] "doc" 42)
from hy.core.language import interleave
import hy
from hy import HyExpression, HySymbol

def _hy_anon_fn_1():
    None
    return HyExpression(((([] + [HySymbol('do')]) + [HyExpression((([] + [HySymbol('setv')]) + list((interleave([], []) or []))))]) + list((['doc', 42] or []))))
hy.macros.macro('foo')(_hy_anon_fn_1)
<function _hy_anon_fn_1 at 0x000001E6E05F4F28>
=> (foo)
None
'doc'
42
42
=> (disassemble '(foo))
from hy.core.language import disassemble
from hy import HyExpression, HySymbol
disassemble(HyExpression(([] + [HySymbol('foo')])))
"Module(body=[Expr(value=Name(id='None')), Expr(value=Str(s='doc')), Expr(value=Num(n=42))])"

[gilch]

I suspect this is due to a compiler mutation #1542.