patch 8.1.1443: popup window padding and border not implemented yet
Problem: Popup window padding and border not implemented yet.
Solution: Implement padding and border. Add core position and size to
popup_getpos().
diff --git a/src/testdir/dumps/Test_popupwin_20.dump b/src/testdir/dumps/Test_popupwin_20.dump
new file mode 100644
index 0000000..237b1de
--- /dev/null
+++ b/src/testdir/dumps/Test_popupwin_20.dump
@@ -0,0 +1,15 @@
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