Correct a return type in the documentation.
Correct a return type in the documentation.

The prototype for dotconf_command_loop_until_error says that
the function returns int, but it actually returns const char *, as
shown elsewhere.

Signed-off-by: Christopher Brannon <12dbcddb2a34235e759e3c56208f0d4ec028c34a@gmail.com>
Signed-off-by: William Hubbs <54cd4f6a53c83578a2ea0a02eb065faed9769f8e@gmail.com>

williamh/dotconf,williamh/dotconf