---input---
123 -11 0 -0 0.5 .5 1. -0.5 +0.5 -.5 -1. 2e1 -2e1 2e -2e +2e e.3 -e.3 11.2e-3 -11.2e-3 5_6 5__6 _5 6_ 5.6_7 5.67_

---tokens---
'123'         Literal.Number.Integer
' '           Text
'-'           Operator
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'0'           Literal.Number.Integer
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'0.5'         Literal.Number.Float
' '           Text
'.5'          Literal.Number.Float
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'1.'          Literal.Number.Float
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'.5'          Literal.Number.Float
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'11.2e-3'     Literal.Number.Float
' '           Text
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'5.6_7'       Literal.Number.Float
' '           Text
'5.67'        Literal.Number.Float
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'\n'          Text.Whitespace