add regression test

scripts/regression_tests.pd

-#N canvas 3 60 749 617 12;
+#N canvas 3 60 749 571 12;
 #X obj 465 281 r \$0-result;
 #X obj 159 179 bng 31 250 50 0 empty empty Run_all 39 13 0 12 -262144
 -1 -1;
@@ -38,6 +38,7 @@ is handy for some binbuf tests.;
 #X obj 145 1011 rtest list_cat_clear;
 #X obj 145 1066 rtest list_cat_anything;
 #X obj 145 1121 rtest list_cat_reentrancy;
+#X obj 145 1176 rtest canvas_f;
 #X connect 0 0 28 0;
 #X connect 1 0 5 0;
 #X connect 2 0 4 0;
@@ -62,3 +63,4 @@ is handy for some binbuf tests.;
 #X connect 27 0 30 0;
 #X connect 30 0 31 0;
 #X connect 31 0 32 0;
+#X connect 32 0 33 0;

scripts/regression_tests/canvas_f.pd

-#N canvas 447 229 471 300 12;
+#N canvas 3 60 953 300 12;
 #X obj 29 33 inlet;
-#X obj 29 102 ../utils/creation-test;
-#X msg 29 62 symbol ../regression_tests/canvas_f_abstraction;
-#X obj 29 131 list prepend apply manual width setting to subpatch with
+#X obj 29 142 ../utils/creation-test;
+#X msg 29 112 symbol ../regression_tests/canvas_f_abstraction;
+#X obj 29 171 list prepend apply manual width setting to subpatch with
 '#X f' syntax;
-#X obj 29 176 outlet;
-#X connect 0 0 2 0;
+#X obj 29 246 outlet;
+#X obj 29 62 trigger bang bang;
+#X obj 469 142 ../utils/creation-test;
+#X msg 469 112 symbol ../regression_tests/canvas_f_abstraction2;
+#X obj 469 171 list prepend apply manual width setting to subpatch
+with comma syntax;
+#X text 176 23 Pd originally used the "#X restore etc. \, f 12" syntax
+to set manual width. Now it uses an "#X f 12" on a separate line. We
+support both in Purr Data and check here for regressions.;
+#X connect 0 0 5 0;
 #X connect 1 0 3 0;
 #X connect 2 0 1 0;
 #X connect 3 0 4 0;
+#X connect 5 0 2 0;
+#X connect 5 1 7 0;
+#X connect 6 0 8 0;
+#X connect 7 0 6 0;
+#X connect 8 0 4 0;

scripts/regression_tests/canvas_f_abstraction2.pd

+#N canvas 464 271 450 300 12;
+#N canvas 0 0 450 300 test 0;
+#X restore 106 71 pd test, f 8;