[S05] now use :Foo and :Foo<Bar> for uniprops
[S05] now use :Foo and :Foo<Bar> for uniprops

The old isFoo notation was fragile and could not easily extend to Unicode
properties with values.  We'll use pair notation instead.  The match of
a pair value is via smartmatch, so both string and numeric comparisons
are available, for instance.

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