more tests, fixed some incorrect behaviour

src/largparse.lua

@@ -250,7 +250,7 @@ function Parser:parse(args)
                      element = self:assert(state.context[name], "unknown option " .. name)
                      state:handle_option(name)
 
-                     if i ~= #data and not (element:can_take(0) and data:sub(i+1, i+1):match "[a-zA-Z]") then
+                     if i ~= #data and not (element.minargs == 0 and data:sub(i+1, i+1):match "[a-zA-Z]") then
                         state:handle_argument(data:sub(i+1))
                         break
                      end

src/state.lua

@@ -65,7 +65,7 @@ function State:get_result()
                result[element.target] = invocations[1][1]
             end
          else
-            result[element.target] = invocations[1] or {}
+            result[element.target] = invocations[1]
          end
       else
          if element.maxargs == 0 then