tests/test-alias.out

update --clean: do not unlink added files (issue575)

% basic
% unknown
*** [alias] unknown: command bargle is unknown
% ambiguous
*** [alias] ambiguous: command s is ambiguous
% recursive
*** [alias] recursive: circular dependency on recursive
adding foo
% with opts
C foo
% interaction with defaults
0:e63c23eaa88a
-1:000000000000