doc: Tweak PIM4 link

gcc:
	* doc/gm2.texi (What is GNU Modula-2): Tweak PIM4 link.

diff --git a/gcc/doc/gm2.texi b/gcc/doc/gm2.texi
index 40668f7f8c4f3e9ca1d8f814391fdf745a680b8c..b2e4aa2e9c012e8d56025fd39aee8f5f5ebdfad1 100644 (file)
--- a/gcc/doc/gm2.texi
+++ b/gcc/doc/gm2.texi
@@ -108,7 +108,7 @@ PIM3: 'Programming in Modula-2', 3rd Corrected Edition, Springer Verlag,
 1985 (PIM3).
 
 PIM4: 'Programming in Modula-2', 4th Edition, Springer Verlag, 1988
-(@uref{http://freepages.modula2.org/report4/modula-2.html, PIM4}).
+(@uref{https://freepages.modula2.org/report4/modula-2.html, PIM4}).
 
 ISO: the ISO Modula-2 language as defined in 'ISO/IEC Information
 technology - programming languages - part 1: Modula-2 Language,