fix some typos in docs

exercises/concept/doctor-data/.docs/hints.md

@@ -21,4 +21,4 @@
 
 ## 3. Look into the inner workings
 
-- The `shoot_buster` member function seems to be depenedent on an internal counter.
+- The `shoot_buster` member function seems to be dependent on an internal counter.

exercises/concept/election-day/.docs/instructions.md

@@ -27,7 +27,7 @@ You can use an `initializer list` instead:
 
 ```cpp
 ElectionResult hamilton{"Alex", 1804};
-// => the hamilton object was intialized with the name "Alex" and 1804 votes.
+// => the hamilton object was initialized with the name "Alex" and 1804 votes.
 ```
 
 Create a function `vote_count` that will take a reference to an `ElectionResult` as an argument and will return the number of votes in the `ElectionResult`.

exercises/concept/election-day/.docs/introduction.md

@@ -32,7 +32,7 @@ budget -= pro_computer_wheels;
 // balance is also 301;
 ```
 Reseating (changing the binding of a `reference`) is not possible.
-You cannot have an unitialized `reference`.
+You cannot have an uninitialized `reference`.
 `References` need to be initialized with an existing variable.
 
 ```cpp
@@ -46,7 +46,7 @@ savings = side_acc;
 // savings and main_acc are now -20
 // as this uses the **value** of side_acc
 savings += 20;
-// savings and main_acc are now 0, side_acc is stil -20
+// savings and main_acc are now 0, side_acc is still -20
 
 int& future_budget;
 // => compiler error, reference must be bound!

exercises/concept/lasagna/.docs/introduction.md

@@ -35,7 +35,7 @@ int potatoes = 40;
 ~~~~exercism/caution
 C++ does allow using uninitialized variables.
 Until the variable is deliberately set, it is undefined and might contain anything.
-To avoid used-before-set errors and undefined behavior it is adviseable to **always initialize**.
+To avoid used-before-set errors and undefined behavior it is advisable to **always initialize**.
 Undefined behavior can crash your program at the worst possible moment, while it was running fine previously.
 It cannot be stressed enough: avoid undefined behavior at all cost.
 ~~~~

exercises/concept/vehicle-purchase/.docs/introduction.md

@@ -89,4 +89,4 @@ if (int v{2 * num}; v > 10) {
 // => 14
 ```
 
-> Note: any variables created in the initialization cannot be accesed after the end of the if statement.
+> Note: any variables created in the initialization cannot be accessed after the end of the if statement.