Index: doc/example-scripts/tk-spread.tcl
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diff -u -N -r1711d2463a88d72589e00a87b0a0842cf8e7f9fa -ra963e8896fd07c345ccfa034cbd043344edbf083
--- doc/example-scripts/tk-spread.tcl	(.../tk-spread.tcl)	(revision 1711d2463a88d72589e00a87b0a0842cf8e7f9fa)
+++ doc/example-scripts/tk-spread.tcl	(.../tk-spread.tcl)	(revision a963e8896fd07c345ccfa034cbd043344edbf083)
@@ -1,5 +1,5 @@
 # A small Spreadsheet implementation, originally developed by Richard
-# Suchenwirth in plain Tcl (see http://wiki.tcl-lang.org/1287). The
+# Suchenwirth in plain Tcl (see https://wiki.tcl-lang.org/1287). The
 # spreadsheet was rewritten in an object oriented manner as a design
 # study in NX by Gustaf Neumann in May 2011.
 #