Hi,
Please find the details for your question "Line spacing issue when converting Doc to HTML".
I am able to reproduce the issue and this issue has been fixed and it will be available in our next weekly development build 7.2.0.8. Please refer the below link for weekly development build updates.
http://www.syncfusion.com/downloads/product/build.aspxPlease download once it is available by next week and let us know if this helps you.
Best Regards,
Bhuvana