I am using SPD 2013 to edit a custom master page for Sharepoint 2013. I have a publishing site setup in a dev environment for my testing. Everytime I edit and save my master file, it adds literally thousands of blank lines into my file making it nearly unusable to edit. The file loads slow and is up to about 200000 lines. Is this a known bug, or is there a fix? Right now can't see how I can get around this?
Same will happen when i add service datasource to sharepoint page using sharepoint designer.