---input---
''
  ''\t ''\n ''\r ''' ''$ '
''

"\"\$${builtins.toString maxArgIndex}\""

"\n"

"cp \"$(nix-build -A ${attr})\" \"$0\" > /dev/null"

"$" #

''$'' #

" \ "

'' ''\ ''

---tokens---
"''"          Literal.String.Multiline
'\n  '        Literal.String.Multiline
"''\\t"       Literal.String.Escape
' '           Literal.String.Multiline
"''\\n"       Literal.String.Escape
' '           Literal.String.Multiline
"''\\r"       Literal.String.Escape
' '           Literal.String.Multiline
"'''"         Literal.String.Escape
' '           Literal.String.Multiline
"''$"         Literal.String.Escape
' '           Literal.String.Multiline
"'\n"         Literal.String.Multiline

"''"          Literal.String.Multiline
'\n\n'        Text

'"'           Literal.String.Double
'\\"'         Literal.String.Escape
'\\$'         Literal.String.Escape
'${'          Literal.String.Interpol
'builtins'    Name.Builtin
'.'           Operator
'toString'    Name.Builtin
' '           Text
'maxArgIndex' Text
'}'           Literal.String.Interpol
'\\"'         Literal.String.Escape
'"'           Literal.String.Double
'\n\n'        Text

'"'           Literal.String.Double
'\\n'         Literal.String.Escape
'"'           Literal.String.Double
'\n\n'        Text

'"'           Literal.String.Double
'cp '         Literal.String.Double
'\\"'         Literal.String.Escape
'$('          Literal.String.Double
'nix-build -A ' Literal.String.Double
'${'          Literal.String.Interpol
'attr'        Text
'}'           Literal.String.Interpol
')'           Literal.String.Double
'\\"'         Literal.String.Escape
' '           Literal.String.Double
'\\"'         Literal.String.Escape
'$0'          Literal.String.Double
'\\"'         Literal.String.Escape
' > /dev/null' Literal.String.Double
'"'           Literal.String.Double
'\n\n'        Text

'"'           Literal.String.Double
'$'           Literal.String.Double
'"'           Literal.String.Double
' '           Text
'#'           Comment.Single
'\n\n'        Text

"''"          Literal.String.Multiline
'$'           Literal.String.Multiline
"''"          Literal.String.Multiline
' '           Text
'#'           Comment.Single
'\n\n'        Text

'"'           Literal.String.Double
' '           Literal.String.Double
'\\'          Literal.String.Double
' '           Literal.String.Double
'"'           Literal.String.Double
'\n\n'        Text

"''"          Literal.String.Multiline
' '           Literal.String.Multiline
"''\\"        Literal.String.Escape
' '           Literal.String.Multiline
"''"          Literal.String.Multiline
'\n'          Text