kou commented on a change in pull request #7824:
URL: https://github.com/apache/arrow/pull/7824#discussion_r460444793
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File path: docs/source/format/Columnar.rst
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@@ -76,7 +76,7 @@ concepts, here is a small glossary to help disambiguate.
* **Nested type**: a data type whose full structure depends on one or
more other child types. Two fully-specified nested types are equal
if and only if their child types are equal. For example, ``List<U>``
- is distinct from ``List<V>`` iff U and V are different types.
+ is distinct from ``List<V>`` if U and V are different types.
Review comment:
"iff" is not a typo.
"iff" means "if and only if".
How about changing "iff" to "if and only if" not "if" like the previous
sentence?
```suggestion
is distinct from ``List<V>`` if and only if U and V are different types.
```
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