Copy and Paste from Safari to MS Word Text Form Field adds a trailing space

Question

I know this is just a minor issue, but an inconvenience for me nonetheless.
When I go to the same page and copy and paste the same text from Firefox, the trailing space is not added.
What I find puzzling is that when I paste the same copied text into notepad from Safari, it does not add the trailing space.
So it is likely an issue with MS Word's method of pasting text, but strange to me that it does not happen from Firefox.
Is there a way to inspect the exact contents of the clipboard to see if there are any differences?
I just did a little bit more testing, and found that Word only adds an trailing space when I paste into a "Text Form Field" from only Safari.
Maybe the solution is to stop using MS Word. (Ha, Ha)

Answer 1

OK, I think I found another way to describe my issue:
When I copy text from a webpage in Safari, some form of "meta-information", or formatting data, is kept, and when I paste into MS Word, the formatting from the webpage is retained. In my default setup of Firefox, this formatting meta-information is not retained, it only copies the plain-text.
So my question is actualy: How do I prevent Safari from retaining formatting data, and only copy the plain-text?
I have been testing some clipboard managers, and have yet to find one that will auto-filter out formatting data from text that I copy, but they can after interaction.
The other, current, method I have been using is to:
1. select and copy the text in Safari
2. paste text into notepad
3. select and copy text from notepad
4. paste de-formatted text into MS Word
Or in Firefox:
1. select and copy the text in Firefox
2. paste text into MS Word (no formatting retained)