patch 9.0.0774: the libvterm code is outdated
Problem: The libvterm code is outdated.
Solution: Include libvterm changes from revision 802 to 817. Revert some
changes made for C89.
diff --git a/src/libvterm/t/69screen_reflow.test b/src/libvterm/t/69screen_reflow.test
new file mode 100644
index 0000000..278cc5b
--- /dev/null
+++ b/src/libvterm/t/69screen_reflow.test
@@ -0,0 +1,79 @@
+INIT
+# Run these tests on a much smaller default screen, so debug output is
+# nowhere near as noisy
+RESIZE 5,10
+WANTSTATE
+WANTSCREEN r
+RESET
+
+!Resize wider reflows wide lines
+RESET
+PUSH "A"x12
+ ?screen_row 0 = "AAAAAAAAAA"
+ ?screen_row 1 = "AA"
+ ?lineinfo 1 = cont
+ ?cursor = 1,2
+RESIZE 5,15
+ ?screen_row 0 = "AAAAAAAAAAAA"
+ ?screen_row 1 =
+ ?lineinfo 1 =
+ ?cursor = 0,12
+RESIZE 5,20
+ ?screen_row 0 = "AAAAAAAAAAAA"
+ ?screen_row 1 =
+ ?lineinfo 1 =
+ ?cursor = 0,12
+
+!Resize narrower can create continuation lines
+RESET
+RESIZE 5,10
+PUSH "ABCDEFGHI"
+ ?screen_row 0 = "ABCDEFGHI"
+ ?screen_row 1 = ""
+ ?lineinfo 1 =
+ ?cursor = 0,9
+RESIZE 5,8
+ ?screen_row 0 = "ABCDEFGH"
+ ?screen_row 1 = "I"
+ ?lineinfo 1 = cont
+ ?cursor = 1,1
+RESIZE 5,6
+ ?screen_row 0 = "ABCDEF"
+ ?screen_row 1 = "GHI"
+ ?lineinfo 1 = cont
+ ?cursor = 1,3
+
+!Shell wrapped prompt behaviour
+RESET
+RESIZE 5,10
+PUSH "PROMPT GOES HERE\r\n> \r\n\r\nPROMPT GOES HERE\r\n> "
+ ?screen_row 0 = "> "
+ ?screen_row 1 = ""
+ ?screen_row 2 = "PROMPT GOE"
+ ?screen_row 3 = "S HERE"
+ ?lineinfo 3 = cont
+ ?screen_row 4 = "> "
+ ?cursor = 4,2
+RESIZE 5,11
+ ?screen_row 0 = "> "
+ ?screen_row 1 = ""
+ ?screen_row 2 = "PROMPT GOES"
+ ?screen_row 3 = " HERE"
+ ?lineinfo 3 = cont
+ ?screen_row 4 = "> "
+ ?cursor = 4,2
+RESIZE 5,12
+ ?screen_row 0 = "> "
+ ?screen_row 1 = ""
+ ?screen_row 2 = "PROMPT GOES "
+ ?screen_row 3 = "HERE"
+ ?lineinfo 3 = cont
+ ?screen_row 4 = "> "
+ ?cursor = 4,2
+RESIZE 5,16
+ ?screen_row 0 = "> "
+ ?screen_row 1 = ""
+ ?screen_row 2 = "PROMPT GOES HERE"
+ ?lineinfo 3 =
+ ?screen_row 3 = "> "
+ ?cursor = 3,2