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The idea that is that I would like to be able to 

text -> tokens -> text

For text -> tokens 

(RBScanner on: 'self classVariables: { #A . #B }' readStream)

contents collect: #value

I wrote a little method that takes the result of the RBScanner and recreate the text

But I cannot get this method to work. 

I���m puzzled because the symbols are eaten.

expressionStringFrom: aLine

"self new 

expressionStringFrom:  #('self' 'classVariables:' ${ #A $. #B $}) 

>>> 

'self classVariables: { A . B }'

"

^ String streamContents: [ :s |

aLine 

do: [ :each | s << each ]

separatedBy: [ s space ]]

I tried with print:, printOn:, but I failed. 

Any idea?