cfunction
src/core/io.c on line 521, column 1
(xprint to & xs)
Print to a file or other value explicitly (no dynamic bindings)
with a trailing newline character. The value to print to is the
first argument, and is otherwise the same as `print`. Returns nil.
(def b @"")
(xprint b "HOHOHO")
# => nil
b
# => @"HOHOHO\n"