Centerize text: shift text if smaller, else shift 2020 text 😅

[Shivam010]

Signed-off-by: Shivam Rathore [email protected]

[alexellis]

Thanks for the PR. Can you show how it works?

[Shivam010]

2020 text can accommodate only 16 characters. So, first 8 characters should only contain half of the msg and therefore prefixing spaces in msg, in case of smaller msg. And in case of bigger msg, confining half msg in 8 spaces is only possible by starting msg before 2020 text, therefore prefixing spaces in 2020.