Update multicontext/texture example

- fix typo in help-patch
- pass "sharedcontext" message to [gemwin]
- add some action to the squares

examples/14.multiple_windows/03.texture_sharing.pd

@@ -1,13 +1,10 @@
-#N canvas 224 736 1147 233 10;
+#N canvas 983 248 1147 303 10;
 #X declare -lib Gem;
 #X obj 33 169 gemwin 20 a;
-#X obj 396 181 square;
-#X obj 141 26 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144 -1
--1;
+#X obj 141 26 bng 15 250 50 0 empty empty empty 17 7 0 10 #fcfcfc #000000 #000000;
 #X obj 396 37 gemhead a;
 #X text 158 24 1 create windows;
 #X obj 396 104 pix_texture;
-#X obj 596 181 square;
 #X obj 596 155 pix_texture;
 #X obj 396 72 pix_image ../data/fractal.JPG;
 #X obj 596 59 translateXYZ 2 0 0;
@@ -16,30 +13,62 @@
 #X msg 596 4 context a;
 #X msg 669 4 context b;
 #X msg 80 118 destroy;
-#X text 731 150 on Linux \, this is only supported by [gemglutwindow].
-;
-#X text 730 98 support for texture sharing is limited by Operating
-System \, ggraphics hardware \, openGL implementation and the windowing
-backend.;
-#X msg 33 87 title a \, create \, 1;
-#X msg 168 117 title b \, create \, 1;
+#X text 731 150 on Linux \, this is only supported by [gemglutwindow].;
+#X text 730 98 support for texture sharing is limited by Operating System \, graphics hardware \, openGL implementation and the windowing backend.;
 #X obj 1030 16 declare -lib Gem;
 #X obj 141 46 t b b;
 #X obj 80 141 t a a;
-#X connect 2 0 20 0;
-#X connect 3 0 8 0;
-#X connect 5 0 1 0;
-#X connect 5 1 7 1;
-#X connect 7 0 6 0;
-#X connect 8 0 5 0;
-#X connect 9 0 7 0;
-#X connect 10 0 9 0;
-#X connect 12 0 10 0;
-#X connect 13 0 10 0;
-#X connect 14 0 21 0;
+#X msg 168 117 title b \, offset 512 0 \, create \, 1;
+#X msg 33 87 title a \, offset 0 0 \, create \, 1;
+#N canvas 735 418 450 300 rotating_square 0;
+#X obj 204 202 square;
+#X obj 204 118 t a b;
+#X obj 204 181 rotateXYZ;
+#X obj 277 123 i;
+#X obj 277 146 + 1;
+#X obj 277 169 % 360;
+#X obj 277 192 t f f;
+#X obj 88 53 inlet;
+#X obj 88 76 t a a;
+#X obj 204 97 separator;
+#X obj 88 99 outlet;
+#X obj 349 56 inlet;
+#X connect 1 0 2 0;
+#X connect 1 1 3 0;
+#X connect 2 0 0 0;
+#X connect 3 0 4 0;
+#X connect 4 0 5 0;
+#X connect 5 0 6 0;
+#X connect 6 0 2 3;
+#X connect 6 0 2 2;
+#X connect 6 0 2 1;
+#X connect 6 1 3 1;
+#X connect 7 0 8 0;
+#X connect 8 0 10 0;
+#X connect 8 1 9 0;
+#X connect 9 0 1 0;
+#X connect 11 0 4 1;
+#X restore 396 181 pd rotating_square;
+#X obj 512 181 tgl 18 0 empty empty empty 0 -9 0 10 #fcfcfc #000000 #000000 0 1;
+#X obj 215 199 loadbang;
+#X msg 215 222 sharedcontext 1;
+#X connect 1 0 16 0;
+#X connect 2 0 6 0;
+#X connect 4 0 20 0;
+#X connect 4 1 5 1;
+#X connect 5 0 20 0;
+#X connect 6 0 4 0;
+#X connect 7 0 5 0;
+#X connect 8 0 7 0;
+#X connect 10 0 8 0;
+#X connect 11 0 8 0;
+#X connect 12 0 17 0;
+#X connect 16 0 19 0;
+#X connect 16 1 18 0;
 #X connect 17 0 0 0;
-#X connect 18 0 11 0;
-#X connect 20 0 17 0;
-#X connect 20 1 18 0;
-#X connect 21 0 0 0;
-#X connect 21 1 11 0;
+#X connect 17 1 9 0;
+#X connect 18 0 9 0;
+#X connect 19 0 0 0;
+#X connect 21 0 20 1;
+#X connect 22 0 23 0;
+#X connect 23 0 17 0;