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How do I concatenate a percent % string to a string?

as either do not work

s := "%%" + s + "%"

I know its a special character but don't afford it neither do I find the doc...

UPDATE

The answer was one of my attempts, but it could stay an issue of the compiler/editor. After putting the example into the same feature, compiling, and replacing the old code the compiler did not complain anymore, but still stays as syntax coloration strange

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Pipo
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    Indeed, there was an editor issue in the IDE, this was fixed yesterday, EiffelStudio 19.11 (or next beta) will include the correction. – Jocelyn Jul 19 '19 at 18:11

1 Answers1

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Using the same double-percent string in the second case should do the trick:

s := "%%" + s + "%%"
Alexander Kogtenkov
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  • Thx, was one of my unsuccesful attempts, see my update, it compiled but after some code removes and replaces strangely... even after a EIFGEN remove and recompile – Pipo Jul 19 '19 at 17:46