Improve help files

Minor improvement of various help files.  Made format of help
files more consistent.

help/arrow

@@ -22,24 +22,23 @@ DESCRIPTION
 
     Spaces or tabs on either side of -> are optional.
 
-EXAMPLES
+EXAMPLE
     ; obj pair {one, two}
-    ; obj pair A, B
+    ; obj pair A; obj pair B
     ; p = &A
     ; p->one = 1; p->two = 2
     ; A
-	    obj pair {1, 2}
+	obj pair {1, 2}
 
     ; A->two = &B
-    ; p->two->one = 3; p->two->two = 4
+    ; p->one = 3; p->two = 4
 
-    ; *p->ptwo
+    ; *p
 	    obj pair {3, 4}
 
     ; B = {5,6}
     ; *p->two
-	    obj pair {5, 6}
-
+	    4
 
 LIMITS
     none
@@ -50,7 +49,7 @@ LINK LIBRARY
 SEE ALSO
     address, dereference, isptr, dot
 
-## Copyright (C) 1999  Landon Curt Noll
+## Copyright (C) 1999,2021  Landon Curt Noll
 ##
 ## Calc is open software; you can redistribute it and/or modify it under
 ## the terms of the version 2.1 of the GNU Lesser General Public License