Fixes bug when loading user-provided msg-template.

[clavedeluna]

Type of Changes

	Type
✓	🐛 Bug fix

Closes #5636

[coveralls]

Pull Request Test Coverage Report for Build 3787236917

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• 101 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.002%) to 95.447%

---

Files with Coverage Reduction	New Missed Lines	%
pylint/extensions/private_import.py	1	99.17%
pylint/extensions/consider_ternary_expression.py	3	88.0%
pylint/pyreverse/diagrams.py	4	91.95%
pylint/checkers/base/basic_error_checker.py	5	95.56%
pylint/checkers/refactoring/recommendation_checker.py	5	96.35%
pylint/epylint.py	6	84.13%
pylint/checkers/utils.py	7	95.31%
pylint/checkers/base_checker.py	8	89.55%
pylint/checkers/refactoring/refactoring_checker.py	15	98.13%
pylint/checkers/variables.py	23	97.38%

Totals
Change from base Build 3752298849:	0.002%
Covered Lines:	17672
Relevant Lines:	18515

---

💛 - Coveralls

[Pierre-Sassoulas]

Nice !

[DanielNoord]

@clavedeluna Could you make the news message a little more descriptive? This doesn't really help anybody looking at the changelog to see what has changed. Fix itself LGTM!

[github-actions]

🤖 According to the primer, this change has no effect on the checked open source code. 🤖🎉

This comment was generated for commit 5f2fdd6

[DanielNoord]

@clavedeluna Could you fix the pre-commit failure?

[github-actions]

The backport to maintenance/2.15.x failed:

The process '/usr/bin/git' failed with exit code 1

To backport manually, run these commands in your terminal:

# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add .worktrees/backport-maintenance/2.15.x maintenance/2.15.x
# Navigate to the new working tree
cd .worktrees/backport-maintenance/2.15.x
# Create a new branch
git switch --create backport-7976-to-maintenance/2.15.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 03bd452620558a2159715ce7f5aad9071910e1a4
# Push it to GitHub
git push --set-upstream origin backport-7976-to-maintenance/2.15.x
# Go back to the original working tree
cd ../..
# Delete the working tree
git worktree remove .worktrees/backport-maintenance/2.15.x

Then, create a pull request where the base branch is maintenance/2.15.x and the compare/head branch is backport-7976-to-maintenance/2.15.x.