더북(TheBook)
       |
    31 |         ["faq"]
       |         ^^^^^^^
    = note: expected enum `Option<Vec<String>>`
             found array `[&str; 1]` 
note: associated function defined here
    --> src/main.rs:11:8
       |
    11 |     fn new(
       |        ^^^
    12 |         id: QuestionId,
       |         --------------
    13 |         title: String,
       |         -------------
    14 |         content: String,
       |         ---------------
    15 |         tags: Option<Vec<String>>
       |         -------------------------
    help: try using a conversion method
       |
    29 |         "First Question".to_string(),
       |                         ++++++++++++
    help: try using a conversion method
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