Copy function syntax on 8.1

Hi,

In testing 8.1 I turned on the escape_string_warning.  Now when I issue a COPY FROM / TO 'C:\\test' I am getting the
"nonstandard.." warning since file paths in Windows use the \ character.  I can clear the warning by changing the
syntaxto E'C:\\test'.   

Is their a way to properly escape the \ without using E or will the COPY function have to modified internally to not
returna warning if a \ is passed in the file path? 

Mike