`\\This  is a "test of quotes" and  ano'ther test'  `
`"quotes"`
`"quotesa" foo "" "quotes'b" '' 'foo'"'"'bar'`
`noquotes`
`  aaa1 foo  `
`  aaa2 foo`
`aaa3 foo   `
`  `
``
`\\`
`1''2''3''4`
`' 1'' 2'
`" 1"" 2"
`   "   123"' 234'   `
`1''""''""''""''""2`
`''1""2''`
`''1 ""2 '' ""`
`'\''1`
`1\ 2\ 3\ 4 \ 5`
`\ \ \ \ `
`\ \'\"\ `