Copying a text into a wiki page I got "Internal server error"
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The text is: "to this instance.
I have also"
The problem seems to be the space between "instance." and "I have": if I copy the text into Vi I get "to this instance.<202a> <202a>I have also".
Looking in the web I see <202a> is some "Left To Right Embedding": https://www.compart.com/en/unicode/bidiclass/LRE
I hope this helps.