make: varname-dot-newline.mk:28: Cannot overwrite ".newline" as it is read-only
	in directory <curdir>
make: varname-dot-newline.mk:30: Cannot append to ".newline" as it is read-only
	in directory <curdir>
make: varname-dot-newline.mk:32: Cannot delete ".newline" as it is read-only
	in directory <curdir>
make: Fatal errors encountered -- cannot continue
make: stopped making "try-to-modify" in unit-tests
first
second
backslash newline: <\
>
exit status 0