patch 9.0.0904: various comment and indent flaws

Problem:    Various comment and indent flaws.
Solution:   Improve comments and indenting.
diff --git a/src/Makefile b/src/Makefile
index bd6c187..57f9aad 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -396,7 +396,9 @@
 
 # MZSCHEME
 # Uncomment this when you want to include the MzScheme interface.
-# You may have to build racket from source to make this work.
+# You may have to build racket from source to make this work.  Version 7.9 has
+# been reported to work, version 8.0 probably doesn't work, version 8.5 has
+# been reported to work.
 # NOTE: does not work well together with valgrind.
 #CONF_OPT_MZSCHEME = --enable-mzschemeinterp
 # PLT/mrscheme/drscheme Home dir; the PLTHOME environment variable also works