`@def` macro generator broken on master

[ChrisRackauckas]

I see, name wasn’t escaped:

macro def(name, definition)
    return quote
        macro $(esc(name))()
            esc($(Expr(:quote, definition)))
        end
    end
end
@def test begin
         a = 2
       end

# Now @test "pastes" the code `a=2`

is good now.