Initial commit
initial version
add explanation for $_ in bash
update $_ for bash with more useful example
Update index.ja_JP.md
add $? for bash
add $- for bash
Merge branch 'master' of github.com:bearmini/wtfsyms
add $$ and $! for bash
add $(()), $(), <(), >()
Merge branch 'master' into gh-pages
test jekyll