Peter Klausler dfcccc6dee [flang][runtime] Fix edge case discrepancies with EN output editing ...

The "engineering" ENw.d output editing descriptor has some difficult
edge case behavior for values that might format into a bunch of 9's
or round up to a 1 for a given scale factor.  Fix the algorithm,
and add tests to protect against regressions.

Differential Revision: https://reviews.llvm.org/D127028

2022-06-04 09:14:05 -07:00

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