Should display the script tag given as is.
Currently if script tag is given in Changed by field in Metadata popup it is converting the given script tag to some other value. (Please find the attached screenshot for your reference)
1. Select any of the content type from the selector (Other than Twitter user feed as metadata button is not displayed for this)
2. Click on Metadata button
3. Give the values in the fields (Give the script tags) & Click Save Metadata button
(Ex: <script>alert('Gouthami Testing');</script>) and save the content
4. Click Edit against the content
5. Again click on the Metadata button, verify the Changed by field value