[openstreetmap-website] Strange + and - characters on zoom controls (#164)

[Tom Hughes]

I've pushed 5edb4bf4e5da9e7d48f8bc9f0d87fa6c95fca440 as a workaround for now.

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Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/openstreetmap-website/issues/164#issuecomment-10661553
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