Change Details

**Steps to reproduce:** # Edit a page in "Source editing" mode # Copy text that contains paragraph break and some formatting (e.g. content of https://www.mediawiki.org/wiki/User:Sebastian_Berlin_(WMSE)/Newline ). # Paste into editor. # Select "Convert to wikitext" in the popup. **Actual result:** Pasted text contains only one newline, which is rendered as a space. **Expected result:** Pasted text contains two newlines. **Additional information:** Using Firefox 60.0.1

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