My approch was similar.
Without using any slashes, backslashes, semi-colons, command line options, only two double quotes, and using 64 characters:
printf"$_ is married to $couples{$_}%c",10 for sort keys%couples
Changing the double-quotes into qq{} makes it 67 characters.
Of course, mine fails if anyone has a % in their name. In real Golf, it is the sort of thing they would update the test script to catch.
The most evil newline variant I considered was:
$:=~m{.(.)}s and print "something$1"
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