make a word bold and follow it by
punctuation . Then a space is erroneously introduced after the marked up word, but before the punctuation.
This happens with any tags such as: strong, em, span, a, etc.
I'm typing things like <strong>hello</strong>there.
hello there
hello there
hello there
hello there
Notice the spaces introduced after the closing tags?
Or you can even just make part of the word bold using the toolbar. For example, try to make the chars 'bold' in embolden bold:
here's what you'll get: em
bold en