Hello,
This forum is a user-to-user support forum. My name is Charles and I am a fellow user with decades of experience using Microsoft Word. I have written extensively on using Word and have authored help articles on the Microsoft site.
This depends on how careful you are when you select your text for copying. If you are copying the paragraph mark or line break from the original, then that will be included when you paste. If your source is in Word, you can turn on display of those non-printing formatting marks and make sure you do not include them in your copy.
Here is a page by Word MVP Suzanne Barnhill on these marks:
http://wordfaqs.ssbarnhill.com/NonprintChars.htm
This is a link to a trusted Word MVP website or blog. It contains accurate safe information that I think will help you.
I hope this information helps.
Please let me know if you have any more questions or require further help.
You can ask for more help by replying to this post (Reply button below).
Stay well