"say" to a tied fh on 5.10.0 is broken; we will not test it
stop testing "say" on 5.10.0
On 5.10.1 and later, $\ is set to newline during a PRINT to a tied
filehandle. On 5.10.0, you cannot tell a print from a say.
So, we stop testing on 5.10.0 and put a warning in the docs.
TieCombine filehandles now respect $\ so that "say $tied" will work;
this fixes [rt.cpan.org #73131]
standard git ignore!
append $\ when PRINTing to tied fh
tests, docs, etc