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$ cat -vet test.csv
quote at end"$
no quote at end$
quote and space at end" $
quote and tab at end"^I$

$ perl -ne 'print $_ if $_ =~ /[^"]$/' < test.csv
quote at end"
no quote at end
quote and space at end" 
quote and tab at end"

$ perl -ne 'print ">>>$_<<<\n" if $_ =~ /[^"]$/' < test.csv
>>>quote at end"
...
<<<
>>>quote and tab at end"    
<<<

$ perl -lne 'print $_ if $_ =~ /[^"]$/' < test.csv
no quote at end
quote and space at end" 
quote and tab at end"

$ perl -ne 'chomp; print "$_\n" if $_ =~ /[^"]$/' < test.csv
no quote at end
quote and space at end" 
quote and tab at end"