Fix 'scheme-indent-function' to indent s-expressions starting with a keyword
properly, like this:

(#:foo 1
 #:bar 2)

instead of like this:

(#:foo 1
       #:bar 2)

The fix is made by Mark H Weaver <mhw@netris.org>:
<http://www.netris.org/~mhw/scheme-indent-function.el>

--- a/lisp/progmodes/scheme.el
+++ b/lisp/progmodes/scheme.el
@@ -494,6 +494,12 @@ indentation."
                         (> (length function) 3)
                         (string-match "\\`def" function)))
                (lisp-indent-defform state indent-point))
+              ((and (null method)
+                    (> (length function) 1)
+                    ;; The '#' in '#:' seems to get lost, not sure why
+                    (string-match "\\`:" function))
+               (let ((lisp-body-indent 1))
+                 (lisp-indent-defform state indent-point)))
               ((integerp method)
                (lisp-indent-specform method state
                                      indent-point normal-indent))