Better error message

Summary

This very small MR just adds two more verbose error messages for two mistakes that can appear during cfood development.

Please see the in-code comments for details.

Test Environment

There are unit tests.

Check List for the Author

Please, prepare your MR for a review. Be sure to write a summary and a focus and create gitlab comments for the reviewer. They should guide the reviewer through the changes, explain your changes and also point out open questions. For further good practices have a look at our review guidelines

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Up-to-date JSON schema (or not necessary)
• Appropriate user and developer documentation (or not necessary)
  • How do I use the software? Assume "stupid" users.
  • How do I develop or debug the software? Assume novice developers.
• Annotations in code (Gitlab comments)
  • Intent of new code
  • Problems with old code
  • Why this implementation?

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

For further good practices have a look at our review guidelines.

assigned to @salexan

added 1 commit

• 482839d1 - ENH: another constructive error message

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mentioned in issue #164 (moved)

added 16 commits

• 482839d1...85c2dff9 - 15 commits from branch dev
• 5068f0b3 - Merge branch 'dev' into f-better-error-message

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changed title from Draft: F better error message to Draft: Better error message

changed the description

added 4 commits

• 4c7ef8cc - DOC: improved some documentation of scanner functions
• f3011888 - TST: added failing test for error message check
• ce4843f2 - TST: completed test for empty converter definitions
• 7f645c74 - TST: added test for error message in case of broken record definition

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added 1 commit

• 89586e23 - DOC: added Changelog

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mentioned in issue #173

changed the description

marked the checklist item Reference related issues as completed

marked the checklist item Up-to-date CHANGELOG.md (or not necessary) as completed

marked the checklist item Up-to-date JSON schema (or not necessary) as completed

marked the checklist item Annotations in code (Gitlab comments) as completed

marked the checklist item Appropriate user and developer documentation (or not necessary) as completed

marked this merge request as ready

added 1 commit

• 8ae28108 - STY: autopep8

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added 20 commits

• 8ae28108...294f8fb9 - 19 commits from branch dev
• a2743289 - Merge branch 'dev' into f-better-error-message

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