[S26] replaced magic by the two forms #= and #|
[S26] replaced magic by the two forms #= and #|

Previously, determining whether a declarator blog should attach
to a declaration earlier in the source or later was done by a
"works for most use cases" heuristic. Now it's instead done by
being explicit about what is wanted: #| for "attach to next
declaration" and #= for "attach to previous declaration".

Commit prepared by Damian Conway.

tokuhirom/specs,perl6/specs,prammer/specs,prammer/specs,prammer/specs,perl6/specs,tokuhirom/specs,tokuhirom/specs