MR widget: Clarify ambiguous parsing failure message
What does this MR do and why?
Clarify ambiguous instructions, which led investigation for this internal request into a wrong direction initially. The code comment and the front-end message seemed contradictory to me, with the former being for more useful.
Follow-up to !136990 (diffs)
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Is this needed for a 1 line message change?
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Related to #431850 (closed)
Edited by Katrin Leinweber