Switching back from 'YAML' editor to regular chain editor adds a space character after the '=' in operation 'Document.Update', which inserts the space character in the property's value

How to reproduce:

• create an automation chain in Studio which updates a string property of the current document:

  dc:description=@{Document['dc:title']} @{Fn.getNextId("myuidseq")}
  

• click on button Switch editor twice, a space in inserted after the =

  dc:description = @{Document['dc:title']} @{Context['nextId']}
  

• link this automation to a Contextual tools user action
• deploy and click on the user action

dc:description property is updated but a space character is inserted at the beginning.