Fix Item-Rule matching for items with non-ASCII characters

[Apollys]

Example item text:

Item Class: Warstaves
Rarity: Rare
Superior Maelström Staff
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Warstaff
Quality: +11% (augmented)
Physical Damage: 79-163 (augmented)
Critical Strike Chance: 6.80%
Attacks per Second: 1.25
Weapon Range: 13
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Requirements:
Str: 113
Int: 113
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Sockets: B-B-R 
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Item Level: 70
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+25% Chance to Block Attack Damage while wielding a Staff (implicit)
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Unidentified