fix typo

Author: Mindaugas Macevicius

chapters/ch02.asciidoc

@@ -353,7 +353,7 @@ Humans excell at identifying patterns, and we do so while reading as well. That'
 
 When a set of functions has the same API shape, consumers can intuitively deduce how the next function is used. Consider the native `Array`, where `#forEach`, `#map`, `#filter`, `#find`, `#some`, and `#every` all accept a callback as their first parameter and optionally take the context when calling that callback as their second parameter. Further, the callback receives the current `item`, that item's `index`, and the `array` itself as parameters. The `#reduce` and `#reduceRight` methods are a little different in that the callback receives an `accumulator` parameter in the first position, but then it goes on to receive the current `item`, that item's `index`, the `array`, making the shape quite similar to what we are accustomed to.
 
-The result is we rarely need to reach for documentation in order to understand how these functions are shaped. The difference lies solely in how the consumer-provided callback is used, and what the return value for the method is. `#forEach` doesn't return a value. `#map` returns the result of each invocation, `#filter` returns only the items for which the callback returned a truthy value. `#some` returns `false` unless the callback returns a truthy value for one of the items, in which case it returns `true` and breaks out of the look. `#every` returns `false` unless the callback returns a truthy value for every item, in which case it returns `true`.
+The result is we rarely need to reach for documentation in order to understand how these functions are shaped. The difference lies solely in how the consumer-provided callback is used, and what the return value for the method is. `#forEach` doesn't return a value. `#map` returns the result of each invocation, `#filter` returns only the items for which the callback returned a truthy value. `#some` returns `false` unless the callback returns a truthy value for one of the items, in which case it returns `true` and breaks out of the loop. `#every` returns `false` unless the callback returns a truthy value for every item, in which case it returns `true`.
 
 When we have different shapes for functions that perform similar tasks, we need to make an effort to remember each individual function's shape instead of being able to focus on the task at hand. Consistency is valuable on every level of a codebase: consistent code style reduces friction among developers and conflicts when merging code, consistent shapes optimize readability and give way to intuition, consistent naming and architecture reduces surprises and keeps code uniform.