}{
	{"", ""},
	{"x", "x"},
	{"x.y", "x.y"},
	{"x_y", "x_y"},
	{"αx", "αx"},
	{"αx²", "αx err: invalid syntax at ²"},
	{"go1.2", "go1.2"},
	{"x y", "x y"},
	{"x!y", "x ! y"},
	{"&&||!()xy yx ", "&& || ! ( ) xy yx"},
	{"x~", "x err: invalid syntax at ~"},
	{"x ~", "x err: invalid syntax at ~"},
	{"x &", "x err: invalid syntax at &"},
	{"x &y", "x err: invalid syntax at &"},
}

func TestLex(t *testing.T) {

000003d0  61 ed 97 94 eb 67 82 cf  43 3f cb e7 23 68 fb cc  |a....g..C?..#h..|
000003e0  a3 c1 91 74 2f cc fc 49  44 a8 7b 7b 17 44 6a d5  |...t/..ID.{{.Dj.|
000003f0  4e 0c a7 21 ff 01 fc 2f  17 03 03 00 8b 59 58 d0  |N..!.../.....YX.|
00000400  30 c0 e9 18 f6 de 1c fa  95 a9 1a 3a d4 f9 ed 28  |0..........:...(|
00000410  bd 81 0c 68 82 17 a0 c5  55 5e 96 58 29 c7 50 25  |...h....U^.X).P%|

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