Fix a lot of issues when resuming from a paragraph in a choice or expression block

test/tests/flush.lua

@@ -0,0 +1,38 @@
+local _={}
+_[17]={}
+_[16]={}
+_[15]={}
+_[14]={}
+_[13]={data="d",tags=_[17]}
+_[12]={data="c",tags=_[16]}
+_[11]={data="b",tags=_[15]}
+_[10]={data="a",tags=_[14]}
+_[9]={_[13]}
+_[8]={_[12]}
+_[7]={_[11]}
+_[6]={_[10]}
+_[5]={"return"}
+_[4]={"choice",_[9]}
+_[3]={"text",_[8]}
+_[2]={"choice",_[7]}
+_[1]={"text",_[6]}
+return {_[1],_[2],_[3],_[4],_[5]}
+--[[
+{ "text", { {
+      data = "a",
+      tags = {}
+    } } }
+{ "choice", { {
+      data = "b",
+      tags = {}
+    } } }
+{ "text", { {
+      data = "c",
+      tags = {}
+    } } }
+{ "choice", { {
+      data = "d",
+      tags = {}
+    } } }
+{ "return" }
+]]--