Index: runtime/tutor/tutor
===================================================================
--- runtime/tutor/tutor	(revision 218)
+++ runtime/tutor/tutor	(working copy)
@@ -568,10 +568,10 @@
 
   4. To change every occurrence of a character string between two lines,
      type   :#,#s/old/new/g    where #,# are the line numbers of the range
-                               of lines where the subsitution is to be done.
+                               of lines where the substitution is to be done.
      Type   :%s/old/new/g      to change every occurrence in the whole file.
      Type   :%s/old/new/gc     to find every occurrence in the whole file,
-     			       with a prompt wether to substitute or not.
+     			       with a prompt whether to substitute or not.
 
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 			       LESSON 4 SUMMARY