commit to trait mods to avoid misleading messages
highexpect should not survive whitespace at least

Highwater expectations should be reset as soon as we've committed to a match at
a particular position.  In lieu of proper commit semantics, we'll at least reset
on whitespace for now.
Add tests for advent days #13/#16
throw ex for usage of $foo before $^foo in sub body (RT #123470)
Introduce sub form of unique, deprecate sub uniq

Deprecated since 2014.12 because it currently shows a deprecation warning
from calling the deprecated mesage uniq.
update ChangeLog
Give promise-related exceptions more information

some of that is not visible in the error message, but it might still be useful
for a deeper analysis
Include reference to Channel object in Channel-related errors
implement trait "is hidden_from_USAGE"

MAIN candidates marked with this trait will not appear in the USAGE message
Add helper sub NOT_ALL_DEFINED_TYPE
Add proper type checks on anyof/allof
add new trait to highexpect list
Add sanity test on Supply.merge/zip/zip-latest
move check for post decl placeholder to add_param helper

This is a more direct theft^Wtranslation of std, and it will show the eject near the
polaceholder and not right after the entire block/routine the placeholder is in.
Allow methods in Lock only on definite objects

they segfault on the type object
Merge branch 'nom' into newio