Nightly wrap_comments can break code blocks

[VorpalBlade]

Given:

    /// To add a key compatible with the above service and user run a command like the following:
    /// ```console
    /// $ secret-tool store --label="Descriptive name" service chezmoi-modify-manager username konversation-login
    /// ```

wrap_comments reformats this to:

    /// To add a key compatible with the above service and user run a command
    /// like the following: ```console
    /// $ secret-tool store --label="Descriptive name" service chezmoi-modify-manager username konversation-login
    /// ```

It should instead be reformatted to:

    /// To add a key compatible with the above service and user run a command
    /// like the following:
    /// ```console
    /// $ secret-tool store --label="Descriptive name" service chezmoi-modify-manager username konversation-login
    /// ```

This relates to #3347

[ytmimi]

Closing this as a duplicate of #5244