Twig: Delete source with error prettydiff.beautify.markdown

[rubas]

Source - test.txt.twig

#test.txt test 
#contact=test@test.foo

{{ foo }}
test.com, 111, DIRECT
test.com, 111, DIRECT

Output

Error: Library prettydiff.beautify.markdown does not exist.

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🛑Whatever the reason may be, prettydiff should never delete the source.

We had to rename the file to test.twig.txt as a workaround.