fixed geoDistance code comment
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@ -11,7 +11,7 @@ var tokenFunctions = map[string]func(
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args ...fexpr.Token,
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) (*ResolverResult, error){
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// geoDistance(lonA, latA, lonB, latB) calculates the Haversine
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// distance between 2 coordinates in metres (https://www.movable-type.co.uk/scripts/latlong.html).
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// distance between 2 coordinates in kilometres (https://www.movable-type.co.uk/scripts/latlong.html).
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//
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// The accepted arguments at the moment could be either a plain number or a column identifier (including NULL).
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// If the column identifier cannot be resolved and converted to a numeric value, it resolves to NULL.
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