fix: stable comments by links

A comment on its own line before .name in a member chain, or before
the <T> of a call, printed glued to what comes before it; the next
formatting found it there and added a space. And a block comment at
the end of a callee's line printed before <T>, where the next
formatting found it leading <T>. tidy prints Prettier's fixed point
for all three (js-stable-output).