---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.Float
' '           Text
'-'           Operator
'11'          Literal.Number.Float
' '           Text
'0'           Literal.Number.Float
' '           Text
'-'           Operator
'0'           Literal.Number.Float
' '           Text
'0.5'         Literal.Number.Float
' '           Text
'.'           Operator
'5'           Literal.Number.Float
' '           Text
'1.'          Literal.Number.Float
' '           Text
'-'           Operator
'0.5'         Literal.Number.Float
' '           Text
'+'           Operator
'0.5'         Literal.Number.Float
' '           Text
'-'           Operator
'.'           Operator
'5'           Literal.Number.Float
' '           Text
'-'           Operator
'1.'          Literal.Number.Float
' '           Text
'2e1'         Literal.Number.Float
' '           Text
'-'           Operator
'2e1'         Literal.Number.Float
' '           Text
'2'           Literal.Number.Float
'e'           Name
' '           Text
'-'           Operator
'2'           Literal.Number.Float
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'2'           Literal.Number.Float
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'3'           Literal.Number.Float
' '           Text
'-'           Operator
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' '           Text
'11.2e-3'     Literal.Number.Float
' '           Text
'-'           Operator
'11.2e-3'     Literal.Number.Float
' '           Text
'5'           Literal.Number.Float
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' '           Text
'5'           Literal.Number.Float
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' '           Text
'_5'          Name
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'6'           Literal.Number.Float
'_'           Name
' '           Text
'5.6'         Literal.Number.Float
'_7'          Name
' '           Text
'5.67'        Literal.Number.Float
'_'           Name
'\n'          Text.Whitespace
