fixed syntax

README.org

@@ -90,8 +90,9 @@
 
     Once you’ve declared the  tree you want to get, modify the  last line of the
     source code =(tree-to-dot  ...)= by replacing the default  argument with the
-    name  of your  tree.  For the  first example,  we  would call  =(tree-to-dot
-    vowels)=, while for the second we would call =(tree-to-dot syntax-tree)=.
+    name   of   your   tree.    For   the   first   example,   we   would   call
+ =(tree-to-dot vowels)=,  while    for   the    second   we    would     call
+ =(tree-to-dot syntax-tree)=.
 
     *Only one =(tree-to-dot)= call can be  done at once, else what follows might
     break!*