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Update 'newtype' article to new math delimiters

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Signed-off-by: Danila Fedorin <danila.fedorin@gmail.com>
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Danila Fedorin 2024-05-13 19:01:08 -07:00
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@ -40,7 +40,7 @@ starting with integers.
#### Integers
Addition is an associative binary operation. Furthermore, it's well-known that adding zero to a
number leaves that number intact: \\(0+n = n + 0 = n\\). So we might define a `Monoid` instance for
number leaves that number intact: \(0+n = n + 0 = n\). So we might define a `Monoid` instance for
numbers as follows. Note that we actually provide `(<>)` via the `Semigroup` class,
which _just_ requires the associative binary operation, and serves as a superclass for `Monoid`.
@ -54,7 +54,7 @@ instance Monoid Int where
Cool and good. But hey, there are other binary operations on integers! What about
multiplication? It is also associative, and again it is well-known that multiplying
anything by one leaves that number as it was: \\(1\*n = n\*1 = n\\). The corresponding
anything by one leaves that number as it was: \(1\*n = n\*1 = n\). The corresponding
`Monoid` instance would be something like the following:
```Haskell