|  | @@ -101,7 +101,7 @@ In the above example, the `init_script` creates an array `transactions` in the `
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				|  |  |  map_script::        Executed once per document collected. This is the only required script. If no combine_script is specified, the resulting state 
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				|  |  |                      needs to be stored in an object named `_agg`.
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				|  |  |  +
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				|  |  | -In the above example, the `map_script` checks the value of the type field. If the value if 'sale' the value of the amount field 
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				|  |  | +In the above example, the `map_script` checks the value of the type field. If the value is 'sale' the value of the amount field 
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				|  |  |  is added to the transactions array. If the value of the type field is not 'sale' the negated value of the amount field is added 
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				|  |  |  to transactions.
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