Fix characters

[szepeviktor]

• deduplicate spaces
• replace NBSP characters
• 🇭🇺 https://hu.wikipedia.org/wiki/Id%C3%A9z%C5%91jel
• 🇬🇧 https://en.wikipedia.org/wiki/Quotation_mark

Command: git grep -I -P -e '[^ -~ÁÉÍÓÖŐÚÜŰáéíóöőúüű’©„”–…]'

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[adamlaki]

Thanks Viktor!