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Escaping of `|` in !log messages is overly agressive
Open, Needs TriagePublic

Description

Found while testing T235825: wikitech SAL: handle '{' and '}' in log entries:

I expected !log tools.stashbot {{phabT|T235825}} to expand the phabT template when it was written to a Wikitech SAL page, but the current behavior of changing | to {{!}} in the entire string prevents this from happening. We do want to escape bare | characters, but when they are found inside a {{...}} transclusion construct we really want to leave them as a literal |.

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