report if task has started in show method (#50464)

Author: IanButterworth

base/task.jl

@@ -104,7 +104,9 @@ function show_task_exception(io::IO, t::Task; indent = true)
 end
 
 function show(io::IO, t::Task)
-    print(io, "Task ($(t.state)) @0x$(string(convert(UInt, pointer_from_objref(t)), base = 16, pad = Sys.WORD_SIZE>>2))")
+    state = t.state
+    state_str = "$state" * ((state == :runnable && istaskstarted(t)) ? ", started" : "")
+    print(io, "Task ($state_str) @0x$(string(convert(UInt, pointer_from_objref(t)), base = 16, pad = Sys.WORD_SIZE>>2))")
 end
 
 """