If Microsoft Word adds space when you paste
You may need to paste a word or phrase in your document in several locations at exact positions, e.g. just beside some punctuation mark, only to find out that Word won’t let you do it, adding a space between this mark and your phrase.
Fortunately this annoyance can be solved.
Open the Options of Word (File > Options > Advanced > Cut, Copy and Paste > Smart Cut and Paste > Settings), and clear the option Adjust sentence and word spacing automatically. Now you can paste your text exactly where you need it.
If you like Word adding usually useful blank spaces, you may check again this option after you finish your special “exact-paste” job.