["  ignore leading spaces: 2+0", "\n     ignore leading spaces: 2+1", " ignore leading spaces: 2-1", "ignore leading spaces: 2-2"]
["  ignore leading spaces: 2+0", "\n     ignore leading spaces: 2+1", " ignore leading spaces: 2-1", "ignore leading spaces: 2-2"]

["ignore m.a.s   spaces: 2+0", "ignore m.a.s    spaces: 2+1", "ignore m.a.s  spaces: 2-1", "ignore m.a.s spaces: 2-2"]
["ignore m.a.s   spaces: 2+0", "ignore m.a.s    spaces: 2+1", "ignore m.a.s  spaces: 2-1", "ignore m.a.s spaces: 2-2"]

["Equiv.\vspaces: 3+0", "Equiv.\nspaces: 3+1", "Equiv.\tspaces: 3+2", "Equiv.\fspaces: 3-1", "Equiv.\rspaces: 3-2", "Equiv. spaces: 3-3"]
["Equiv.\vspaces: 3+0", "Equiv.\nspaces: 3+1", "Equiv.\tspaces: 3+2", "Equiv.\fspaces: 3-1", "Equiv.\rspaces: 3-2", "Equiv. spaces: 3-3"]

["casE INDEPENENT: 3+0", "case INDEPENENT: 3+1", "caSE INDEPENENT: 3-1", "cASE INDEPENENT: 3-2"]
["casE INDEPENENT: 3+0", "case INDEPENENT: 3+1", "caSE INDEPENENT: 3-1", "cASE INDEPENENT: 3-2"]

["foo1000bar99baz10.txt", "foo1000bar99baz9.txt", "foo100bar10baz0.txt", "foo100bar99baz0.txt"]
["foo1000bar99baz10.txt", "foo1000bar99baz9.txt", "foo100bar10baz0.txt", "foo100bar99baz0.txt"]

["The 39 steps", "The 40th step more", "The Wind in the Willows", "Wanda"]
["The 39 steps", "The 40th step more", "The Wind in the Willows", "Wanda"]