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### Problem description
<!-- Describe the bug that you fixed/feature request that you
implemented, or link to an existing issue describing it -->
When entering for the end value the same value as the start it is not
recorgnized as valid region, because end must be strictly greater than
begin. Due to the +1 in the Region constructor this is not correct,
because the end is included in the range.
### Implementation description
<!-- Explain what you did to correct the problem -->
### Screenshots
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make before/after sceenshots -->
After:
### Additional things
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