hello | hello

hello${hi}bye | hellobye

ENV hi=hi

hello${hi}bye | hellohibye

ENV space=abc def

hello${space}bye | helloabc,defbye

hello"${space}"bye | helloabc defbye

hello "${space}"bye | hello,abc defbye

ENV leading= ab c

hello${leading}def | hello,ab,cdef

hello"${leading}" def | hello ab c,def

hello"${leading}" | hello ab c

hello${leading} | hello,ab,c

# next line MUST have 3 trailing spaces, don't erase them!

ENV trailing=ab c

hello${trailing} | helloab,c

hello${trailing}d | helloab,c,d

hello"${trailing}"d | helloab c d

# next line MUST have 3 trailing spaces, don't erase them!

hel"lo${trailing}" | helloab c

hello" there " | hello there

hello there | hello,there

hello\ there | hello there

hello" there | hello there

hello\" there | hello",there