Code:
Find : </p>\s*<p>(\p{Ll}.*?</p>)
Replace : \x20\1
Mode : Regex
with "dot all" and "case sensitive" checked
(\x20 is a space)
Note : it will merge only if the paragraph starts with a lower case letter. It won't if it starts with space or punctuation. If you want to give the possibility to have a space before the letter, it will give :
Code:
</p>\s*<p>(\s?\p{Ll}.*?</p>)
but you may have 2 spaces before the targeted word, which is not a problem because it won't be visible in the text (to avoid this, we could put a very simple regex-function instead of the "<space>\1" replace)