fix: use of otherwise (#57573)

curriculum/challenges/english/25-front-end-development/quiz-javascript-strings/66edc31c44f1b9c1d5c5ebca.md

@@ -21,19 +21,19 @@ What is the return value for the `includes()` method?
 
 #### --distractors--
 
-If the substring is found within the string, the method returns the string otherwise, it returns `undefined`.
+If the substring is found within the string, the method returns the string. Otherwise, it returns `undefined`.
 
 ---
 
-If the substring is found within the string, the method returns `true` otherwise, it returns an empty string.
+If the substring is found within the string, the method returns `true`. Otherwise, it returns an empty string.
 
 ---
 
-If the substring is found within the string, the method returns the string otherwise, it returns `null`.
+If the substring is found within the string, the method returns the string. Otherwise, it returns `null`.
 
 #### --answer--
 
-If the substring is found within the string, the method returns `true` otherwise, it returns `false`.
+If the substring is found within the string, the method returns `true`. Otherwise, it returns `false`.
 
 ### --question--
 

curriculum/challenges/english/25-front-end-development/review-javascript-strings/6723c1946e4cd7909a836bb4.md

@@ -62,7 +62,7 @@ console.log(char);  // A
 ## Other Common String Methods
 
 - **The `indexOf` Method**: This method is used to search for a substring within a string. If the substring is found, `indexOf` returns the index (or position) of the first occurrence of that substring. If the substring is not found, `indexOf` returns -1, which indicates that the search was unsuccessful.
-- **The `includes()` Method**: This method is used to check if a string contains a specific substring. If the substring is found within the string, the method returns true otherwise, it returns false. 
+- **The `includes()` Method**: This method is used to check if a string contains a specific substring. If the substring is found within the string, the method returns true. Otherwise, it returns false. 
 - **The `slice()` Method**: This method extracts a portion of a string and returns a new string, without modifying the original string. It takes two parameters: the starting index and the optional ending index. 
 - **The `toUpperCase()` Method**: This method converts all the characters to uppercase letters and returns a new string with all uppercase characters. 
 - **The `toLowerCase()` Method**: This method converts all characters in a string to lowercase. 

curriculum/challenges/english/25-front-end-development/review-javascript/6723d3cfdd0717d3f1bf27e3.md

@@ -262,7 +262,7 @@ console.log(char);  // A
 ## Other Common String Methods
 
 - **The `indexOf` Method**: This method is used to search for a substring within a string. If the substring is found, `indexOf` returns the index (or position) of the first occurrence of that substring. If the substring is not found, `indexOf` returns -1, which indicates that the search was unsuccessful.
-- **The `includes()` Method**: This method is used to check if a string contains a specific substring. If the substring is found within the string, the method returns true otherwise, it returns false. 
+- **The `includes()` Method**: This method is used to check if a string contains a specific substring. If the substring is found within the string, the method returns true. Otherwise, it returns false. 
 - **The `slice()` Method**: This method extracts a portion of a string and returns a new string, without modifying the original string. It takes two parameters: the starting index and the optional ending index. 
 - **The `toUpperCase()` Method**: This method converts all the characters to uppercase letters and returns a new string with all uppercase characters. 
 - **The `toLowerCase()` Method**: This method converts all characters in a string to lowercase.