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The following wikitext:

  First paragraph.

  {{stub}}

becomes:

First paragraph. This article is a stub.

This doesn't happen in REL1_3 without Wal's patch for Bug 60, but it happens
with Wal's patch applied in both REL1_3 and HEAD.

Parser::replaceVariables has these lines:
                
 $regex = '/(\\n?){{(['.$nonBraceChars.']*)(\\|.*?|)}}/s';
 $text = preg_replace_callback( 
             $regex, 
             'wfBraceSubstitution', 
             $text );


Parser::braceSubstitution assigns $newline = $matches[1]; but it doesn't 
use $newline anywhere.

Why should newlines in front of {{ be stripped anyway?