expand user in file module paths; move framework doc index to end, but also fix Scribble latex output when index is not at the end

svn: r9453

original commit: 99ae76c2e9bc0197ca6dee943bd3531b348c276e

collects/scribble/latex-render.ss

@@ -85,6 +85,8 @@
           (render-flow (part-flow d) d ri #f)
           (for-each (lambda (sec) (render-part sec ri))
                     (part-parts d))
+          (when (part-style? d 'index)
+            (printf "\\onecolumn\n\n"))
           null))
       
       (define/override (render-paragraph p part ri)