Minor correction to unsupported file extension error message

[mariehbourget]

Checklist

GitHub

• I've given this PR a concise, self-descriptive, and meaningful title
• I've linked relevant issues in the PR body
• I've applied the relevant labels to this PR
• I've assigned a reviewer

PR contents

• I've consulted ivadomed's internal developer documentation to ensure my contribution is in line with any relevant design decisions
• I've added relevant tests for my contribution
• I've updated the relevant documentation for my changes, including argparse descriptions, docstrings, and ReadTheDocs tutorial pages

Description

Very small PR to improve the error message when a file extension is not supported, especially for double extensions.

We previously used .stem to output the name of the faulty file without extension in the terminal.

This work great with single extension:

• With filename = image.png : filename.stem outputs image

But not with double extensions:

• With filename = image.ome.tif : filename.stem outputs image.ome

This PR now uses .name instead of .stem and outputs the full filename with extension in the terminal, so:

• With filename = image.png : filename.stem outputs image.png
• With filename = image.ome.tif : filename.name outputs image.ome.tif

Linked issues

No related issues in ivadomed.
It was raised in ADS PR629 where we use the same code to check file extensions.

[coveralls]

Pull Request Test Coverage Report for Build 2624102338

• 0 of 1 (0.0%) changed or added relevant line in 1 file are covered.
• 303 unchanged lines in 7 files lost coverage.
• Overall coverage decreased (-4.9%) to 74.137%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
ivadomed/loader/segmentation_pair.py	0	1	0.0%

Files with Coverage Reduction	New Missed Lines	%
ivadomed/inference.py	3	78.09%
ivadomed/scripts/automate_training.py	7	83.4%
ivadomed/main.py	17	51.19%
ivadomed/testing.py	29	48.73%
ivadomed/postprocessing.py	35	53.19%
ivadomed/uncertainty.py	83	12.37%
ivadomed/evaluation.py	129	12.33%

Totals
Change from base Build 2605775728:	-4.9%
Covered Lines:	4529
Relevant Lines:	6109

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💛 - Coveralls

[dyt811]

COOLIO!