Typos and minor fixes to Language list concept exercise

concepts/arrays/introduction.md

@@ -15,7 +15,7 @@ $no_keys == $integer_keys // => equal returns true
 $no_keys === $integer_keys // => strictly equal returns true
 ```
 
-A values are of `mixed` type, and each value in an array is not required to be of the same type.
+All values are of `mixed` type, and each value in an array is not required to be of the same type.
 
 ## Using Arrays
 
@@ -29,4 +29,3 @@ $prime_numbers[5] = 13; // replace 12 with 13
 
 $prime_numbers[] = 17; // array now contains [1, 3, 5, 7, 11, 13, 17]
 ```
-

exercises/concept/language-list/.docs/hints.md

@@ -3,7 +3,7 @@
 ## General
 
 - Review the [Array Language Reference][ref-arrays]
-- review the [Array Function Reference][ref-array-functions]
+- Review the [Array Function Reference][ref-array-functions]
 
 ## 1. Define a function to return an empty language list
 
@@ -12,27 +12,27 @@
 
 ## 2. Modify function to create a list from any number of languages
 
-- refer to the function reference for [variable-length-arguments][variable-arguments]
+- Refer to the function reference for [variable-length-arguments][variable-arguments]
 
 ## 3. Define a function to add a language to the list
 
-- create a new function to perform the operation
-- re-use an [existing function][ref-array-functions] or use the [insert syntax][squre-bracket-syntax]
+- Create a new function to perform the operation
+- Re-use an [existing function][ref-array-functions] or use the [insert syntax][square-bracket-syntax]
 
 ## 4. Define a function to remove an item from the language list
 
-- create a new function to perform the operation
-- re-use an [existing function][ref-array-functions] to perform the operation
+- Create a new function to perform the operation
+- Re-use an [existing function][ref-array-functions] to perform the operation
 
-## 5. Define a function to get the first item in the list 
+## 5. Define a function to get the first item in the list
 
-- create a new function to perform the operation
-- use the [index syntax][index-syntax] to get the first element
+- Create a new function to perform the operation
+- Use the [index syntax][index-syntax] to get the first element
 
 ## 6. Define a function to return how many languages are in the list
 
-- create a new function to perform the operation
-- re-use an [existing function][ref-array-functions] to perform the operation
+- Create a new function to perform the operation
+- Re-use an [existing function][ref-array-functions] to perform the operation
 
 [ref-arrays]: https://www.php.net/manual/en/language.types.array.php
 [ref-array-functions]: https://www.php.net/manual/en/ref.array.php

exercises/concept/language-list/.docs/instructions.md

@@ -15,7 +15,7 @@ language_list();
 
 ## 2. Modify function to create a list from any number of languages
 
-Modify the `language_list` function, so it takes a variadic argument or string languages.
+Modify the `language_list` function, so it takes a variadic argument of languages (strings).
 It should return the resulting list with the languages in the list.
 
 ```php
@@ -78,8 +78,8 @@ It should return the number of languages in the list.
 ```php
 <?php
 
-$language_list = $language_list("PHP", "Prolog", "Wren");
+$language_list = language_list("PHP", "Prolog", "Wren");
 // => ["PHP", "Prolog", "Wren"]
 language_list_length($language_list);
-// => 2
+// => 3
 ```

exercises/concept/language-list/.docs/introduction.md

@@ -17,7 +17,7 @@ $no_keys == $integer_keys // => equal returns true
 $no_keys === $integer_keys // => strictly equal returns true
 ```
 
-A values are of `mixed` type, and each value in an array is not required to be of the same type.
+All values are of `mixed` type, and each value in an array is not required to be of the same type.
 
 ### Using Arrays