Pull request convertxml2txt

[GinerM]

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Pull Request Name

Infos

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Description (to fill)

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Fixes #{issue number}

Type of change

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• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
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• This change requires a documentation update

How Has This Been Tested?

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Reviewers

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Checklist for the reviewers:

• The code follows the style guidelines of this project
• The code is commented, particularly in hard-to-understand areas
• The documentation has been updated if necessary
• The changes generate no new errors, warnings or notes during the tests (package or CRAN tests)
• New tests have been added on the package to prove the fix is effective or the new feature works
• New and existing unit tests pass locally and remotely with those changes

If this pull request add breaking changes for other SticsRPacks packages:

• The team of the other package has been informed of the changes to come
• Another pull request has been proposed on their package to account for the potential impacts of the changes (optional)