question and explanation of kcna quiz too long

[hoangndst]

Describe the bug
question and explanation of telegram api:

• question: Poll question, 1-300 characters
• explanation: Text that is shown when a user chooses an incorrect answer or taps on the lamp icon in a quiz-style poll, 0-200 characters with at most 2 line feeds after entities parsing.

return error:

body: {
      ok: false,
      error_code: 400,
      description: 'Bad Request: message is too long'
},