Task name should not allow spaces or newlines

[LindsayHill]

st2flow lets me create a task name with newlines and spaces, resulting in oddities like this:

version: 1.0
tasks:
  # [201, 155]
  foo
bar
fa:
    action: chatops.format_execution_result

^^ this was with one action on canvas, set name to foo\nbar\nfa