PL SQL Beautifier, with the same preferences from version 14, the result is completely different. Even multi parameters in signature function or procedure are not align
I applied the Beautifier to both version 14 and version 15 and the result is different. Even if i pick a Pkb file and put in the both versions the editor showing the code is different in this questions of tabs and spaces
It seems that you have selected an editor font that is not fixed spaced. This causes the visual differences. Go to Preferences > User Interface > Fonts and select a fixed spaced font like "Courier New" or "Lucida Console" for the editor.