[r6rs-discuss] [Formal] Error in Runge-Kutta example

[AndrevanTonder]

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Name        : Andre van Tonder
Email       : andre at het.brown.edu
Type        : defect
Priority    : minor
Component   : Appendix C example
Version     : 5.92
Pages       : 75
Dependencies: None

Summary:
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The Runge-Kutta library should export HEAD and TAIL, otherwise these are 
unbound in the toplevel program at the end of page 76.