addspan bug

Hi,

I dynamically adding column span in data table but when i give text to addSpan

Function it skips the regular expression ‘\t’ and shows only with one space.

I confirm from console that string appears with ‘\t’ expression

Hello,

It mostly related to general HTML specification.
To preserve the special characters and formatting, you can wrap your text into the `

` tag: https://snippet.webix.com/ahqliczf