• VSCode Version: Code - Insiders 1.20.0-insider (5c8c834, 2018-01-11T06:17:01.111Z)
• OS Version: Linux x64 4.4.0-21-generic
• Extensions: none

Steps to Reproduce:

1. Create a file a.ts with the text // https://github.com/Microsoft/vscode/issues
2. Copy the following text to clipboard:

function f() {
    return 0;
}

3. Select the whole document (ctrl-a) and paste.
4. For a few seconds, the pasted code is underlined as if it is a URL, and can even be clicked on.