[Chicken-janitors] #557: pretty-print issue on master

[Chicken Trac]

#557: pretty-print issue on master
------------------------------+---------------------------------------------
 Reporter:  mario             |       Owner:  felix
     Type:  defect            |      Status:  new  
 Priority:  critical          |   Milestone:  4.7.0
Component:  core libraries    |     Version:  4.6.x
 Keywords:  pp, pretty-print  |  
------------------------------+---------------------------------------------
 It seems that the current master code for {{{pretty-print}}} is slightly
 broken.

 Here's a simple test case:
 {{{
 (pp "\\\"")
 }}}

 4.6.3 prints {{{"\\\""}}}, while master prints {{{"\\""}}}.

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Ticket URL: <http://bugs.call-cc.org/ticket/557>
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