What is the output?

def gen$\_$command$($application$,**$kwargs$)$:

command $=$ application

for key in kwargs:

value $=$ kwargs$[$key$]$

command $+=$ f$\text{'}--\{$key$\}=\{$value$\}\text{'}$

return command

print$($gen$\_$command$(\text{'}$ls$\text{'},$ color$=$'always', sort$=$'size', format$=$'long'$))$