Small Fixes from CI Fails

Fixed some small argument name errors that were causing the CI to fail.

Also sorted reflinks and touched up some language int he `hints.md` file and the instructions.

exercises/concept/currency-exchange/.docs/hints.md

@@ -19,7 +19,7 @@
 ## 4. Calculate number of bills
 
 - You need to divide `amount` into `denomination`.
-- You need to use type casting to _int_ to get the exact number of bills.
+- You need to use type casting to `int` to get the exact number of bills.
 - To remove decimal places from a `float`, you can convert it to `int`.
 
   **Note:** The `//` operator also does floor division. But, if the operand has `float`, the result is still `float`.
@@ -32,12 +32,12 @@
 ## 6. Calculate value after exchange
 
 - You need to calculate `spread` percent of `exchange_rate` using multiplication operator and add it to `exchange_rate` to get the exchanged currency.
-- The actual rate needs to be computed. Remember to add exchange rate and exchange fee.
-- You can get exchanged money affected by commission by using divide operation and type casting _int_.
+- The actual rate needs to be computed. Remember to add exchange _rate_ and exchange _fee_.
+- You can get exchanged money affected by commission by using divide operation and type casting to `int`.
 
 
+[division-operator]: https://docs.python.org/3/tutorial/introduction.html#numbers
+[multiplication-operator]: https://docs.python.org/3/tutorial/introduction.html#numbers
 [python-numbers-tutorial]: https://docs.python.org/3/tutorial/introduction.html#numbers
 [python-numeric-types]: https://docs.python.org/3.9/library/stdtypes.html#numeric-types-int-float-complex
-[division-operator]: https://docs.python.org/3/tutorial/introduction.html#numbers
 [subtraction-operator]: https://docs.python.org/3/tutorial/introduction.html#numbers
-[multiplication-operator]: https://docs.python.org/3/tutorial/introduction.html#numbers

exercises/concept/currency-exchange/.docs/instructions.md

@@ -12,6 +12,7 @@ Create the `exchange_money()` function, taking 2 parameters:
 This function should return the value of the exchanged currency.
 
 **Note:** If your currency is USD and you want to exchange USD for EUR with an exchange rate of `1.20`, then `1.20 USD == 1 EUR`.
+
 ```python
 >>> exchange_money(127.5, 1.2)
 106.25

exercises/concept/currency-exchange/.docs/introduction.md

@@ -70,9 +70,9 @@ To convert a float to an integer, you can use `int()`. Also, to convert an integ
 3.0
 ```
 
-[arbitrary-precision]: https://en.wikipedia.org/wiki/Arbitrary-precision_arithmetic#:~:text=In%20computer%20science%2C%20arbitrary%2Dprecision,memory%20of%20the%20host%20system.
-[numeric-type-docs]: https://docs.python.org/3/library/stdtypes.html#typesnumeric
-[`int()` built in]: https://docs.python.org/3/library/functions.html#int
-[`float()` built in]: https://docs.python.org/3/library/functions.html#float
 [0.30000000000000004.com]: https://0.30000000000000004.com/
+[`float()` built in]: https://docs.python.org/3/library/functions.html#float
+[`int()` built in]: https://docs.python.org/3/library/functions.html#int
+[arbitrary-precision]: https://en.wikipedia.org/wiki/Arbitrary-precision_arithmetic#:~:text=In%20computer%20science%2C%20arbitrary%2Dprecision,memory%20of%20the%20host%20system.
 [floating point math]: https://docs.python.org/3.9/tutorial/floatingpoint.html
+[numeric-type-docs]: https://docs.python.org/3/library/stdtypes.html#typesnumeric

exercises/concept/currency-exchange/.meta/exemplar.py

@@ -39,7 +39,7 @@ def get_number_of_bills(amount, denomination):
     :return: int - number of bills that can be obtained from the amount.
     """
 
-    return int(budget) // denomination
+    return int(amount) // denomination
 
 
 def get_leftover_of_bills(amount, denomination):
@@ -50,7 +50,7 @@ def get_leftover_of_bills(amount, denomination):
     :return: float - the amount that is "leftover", given the current denomination.
     """
 
-    return budget % denomination
+    return amount % denomination
 
 
 def exchangeable_value(budget, exchange_rate, spread, denomination):