fix rst option list at EOF (follow-up #17442) (#17638)

lib/packages/docutils/rst.nim

@@ -2067,7 +2067,7 @@ proc parseOptionList(p: var RstParser): PRstNode =
       c.add(b)
       result.add(c)
     else:
-      dec p.idx  # back to tkIndent
+      if currentTok(p).kind != tkEof: dec p.idx  # back to tkIndent
       break
 
 proc parseDefinitionList(p: var RstParser): PRstNode =

tests/stdlib/trstgen.nim

@@ -1362,6 +1362,7 @@ Test1
           output)
     check("""<th align="left">-d</th><td align="left">option</td>""" in
           output)
+    check "<p>option</p>" notin output
 
   test "Option list 3 (double /)":
     let input = dedent """
@@ -1378,6 +1379,7 @@ Test1
           output)
     check("""<th align="left">-d</th><td align="left">option</td>""" in
           output)
+    check "<p>option</p>" notin output
 
   test "Roles: subscript prefix/postfix":
     let expected = "See <sub>some text</sub>."