Test

[BelaPfeffer]

Description

Updated appendASCII Function
Added compress 64 function and isASCII Function
Created XMLHandler_test.cpp
Replaced new/delete with a string
replaced packs_epi16 with shuffle
Streamlinde the code

Problem:
I tried to benchmark the runtime but my Hotspot is not working properly and the changes doesn't have a significant Runtime improvement

I tested the impelementation with FileConverter and FileInfo But none of them were significantly faster

Checklist

• Make sure that you are listed in the AUTHORS file
• Add relevant changes and new features to the CHANGELOG file
• I have commented my code, particularly in hard-to-understand areas
• New and existing unit tests pass locally with my changes
• Updated or added python bindings for changed or new classes (Tick if no updates were necessary.)

How can I get additional information on failed tests during CI

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If your PR is failing you can check out

• The details of the action statuses at the end of the PR or the "Checks" tab.
• http://cdash.seqan.de/index.php?project=OpenMS and look for your PR. Use the "Show filters" capability on the top right to search for your PR number.
  If you click in the column that lists the failed tests you will get detailed error messages.

Advanced commands (admins / reviewer only)

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• /reformat (experimental) applies the clang-format style changes as additional commit. Note: your branch must have a different name (e.g., yourrepo:feature/XYZ) than the receiving branch (e.g., OpenMS:develop). Otherwise, reformat fails to push.
• setting the label "NoJenkins" will skip tests for this PR on jenkins (saves resources e.g., on edits that do not affect tests)
• commenting with rebuild jenkins will retrigger Jenkins-based CI builds

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