[perl #120895] heredocs get tabs removed when asked to dedent whitespace

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# New Ticket Created by  Tobias Leich 
# Please include the string:  [perl #120895]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=120895 >


<FROGGS> p: say qq:to/EOF/ ~~ /\t/;␤\thello␤EOF␤# the tab is preserved
<camelia> rakudo-parrot c14a84: OUTPUT«｢  ｣␤␤»
<FROGGS> p: say qq:to/EOF/ ~~ /\t/;␤    \thello␤    EOF␤# now it is gone
<camelia> rakudo-parrot c14a84: OUTPUT«Nil␤»

In the second example it is meant to strip four space chars, but additionally 
it converts the tabs to space chars. Which is bad for e.g. Makefiles.