Function svn_opt_push_implicit_dot_target 

pub unsafe extern "C" fn svn_opt_push_implicit_dot_target(
    targets: *mut apr_array_header_t,
    pool: *mut apr_pool_t,
)

If no targets exist in @a *targets, add `.’ as the lone target.

(Some commands take an implicit “.” string argument when invoked with no arguments. Those commands make use of this function to add “.” to the target array if the user passes no args.)