buffer_putnlflush(3)
write '\n' to buffer and flush
SYNTAX
#include <buffer.h>
int buffer_putnlflush(buffer* b);
DESCRIPTION
buffer_putnlflush writes a single ASCII new-line character ('\n') to
b and calls buffer_flush(b).
RETURN VALUE
0 if everything is fine, -1 on error (setting errno).
