sh.lang: Add test commands and history expansion
- Test commands:
test,[…]and[[…]] - History expansion :
!…:…:…and^…^…^ - No need for
\%{unescaped-space}(or other unescaped boundary character) butdef:escapemust be included first
test, […] and [[…]]
!…:…:… and ^…^…^
\%{unescaped-space} (or other unescaped boundary character) but def:escape must be included first