cars-assemble: Update introduction.md (#563)

* cars-assemble: Update introduction.md

`<>` inequality operator doesn't seem to exist in Clojure, replaced it with `not=`

* Improve wording related to comparison operators

* Add note about equality of numbers

exercises/concept/cars-assemble/.docs/introduction.md

@@ -7,7 +7,7 @@ Numbers in Clojure include:
 
 Two common numeric types are `int` and `float`. An `int` is a 32-bit integer and a `float` is a 64-bit floating-point number.
 
-Arithmetic is done using the standard arithmetic operators. Numbers can be compared using the standard numeric comparison operators and the equality (`=`) and inequality (`<>`) operators.
+Arithmetic is done using the standard arithmetic operators. Numbers can be compared using the standard numeric comparison operators (`>`, `<`, `<=`, `>=`), the equality operator (`=`) and the non-equality operator (`not=`).
 
 In this exercise you must conditionally execute logic. A common way to do this in Clojure is by using `cond`:
 
@@ -16,3 +16,14 @@ In this exercise you must conditionally execute logic. A common way to do this i
       (> x 7) "Expression to evaluate when x is greater than 7"
       :else   "Expression to evaluate in all other cases")
 ```
+
+## Note
+The `==` operator might be preferable to `=` in some cases where numbers need to be compared irrespective of the exact type. For instance,
+```clojure
+(== 5.0 5) ;; true as both numbers are equal when type is ignored
+(= 5.0 5) ;; false as the types of numbers are also taken into account here i.e. float is different from int
+```
+The [Clojure guide on Equality][guide-equality], specifically the section on [Numbers][guide-numbers] goes into more details.
+
+[guide-equality]: https://clojure.org/guides/equality
+[guide-numbers]: https://clojure.org/guides/equality#numbers