Code copy in learn pages does not preserve line spacing

[Nadeeshan96]

Description

A brief description of the bug.

When copying code from learn pages using the copy button, the line spacing is not preserved.
E.g.:
https://ballerina.io/learn/get-started/#write-a-simple-rest-api

The above code is pasted as follows without proper formatting and line spacing.

import ballerina/http;

listener http:Listener httpListener = new (8080);

service / on httpListener {
resource function get greeting() returns string {
return "Hello, World!";
}

resource function get greeting/[string name]() returns string {
return "Hello " + name;
}
}

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      - Reason/EngineeringMistake - The issue occurred due to a mistake made in the past.
      - Reason/Regression - The issue has introduced a regression.
      - Reason/MultipleComponentInteraction - Issue occured due to interactions in multiple components.
      - Reason/Complex - Issue occurred due to complex scenario.
      - Reason/Invalid - Issue is invalid.
      - Reason/Other - None of the above cases.