#1

Input:
"Sentence 1

Sentence 2

Sentece 3"

Output:
"Sentence 1 Sentence 2 Sentence 3

#2

Can be done with the Regex Find/Replace plugin.

  • Select the paragraphs.
  • Run Regex Find/Replace.
  • Enable “Use regular expressions” and “Use only in selection” if they’re not already.
  • Replace \n\n (means 2 newlines) with (a single space).

Not quite as fast as select and run, but probably good enough unless you do this very often.

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