paren-free calls revisited

[satyr]

with arguments

• coffee#1407
• "parenless method chains" and "parenless call do" incompatibility #61

8118fd5

f a; .g b, c; .h d

↓

f a .g b, c .h d

Line-leading dots are working this way already. Expanding it to spaced dots seems acceptable.

without arguments

• coffee#514
• coffee#1257
• coffee#1412

Considering this must beat () in both conciseness and readability, postfix ! is probably the only contender.

f().g()

↓

f!.g!

Semiautovivification (with ADI) conflicts, but can be adjusted. (a!b wasn't very intuitive anyway.)

[adrusi]

Nice, I'm liking it. postfix ! is much better than do because do func is actually longer than func(). Space leading dots are also very nice.