I added a sentence to the for-statement docu to warn about iterating over un-sorted lists

Description

I added a sentence to the for-statement docu to warn about iterating over un-sorted lists.
For most people this might be obvious but might help some.

Environment

None

Assignee

Unassigned

Reporter

Doris Schioberg

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External issue ID

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Components

Affects versions

Priority

Low
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