I fixed errors and its able to run the code

Author: khalidbih

Sprint-2/1-key-errors/0.js

@@ -5,10 +5,10 @@
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
 
-function capitalise(str) {
-  let str = `${str[0].toUpperCase()}${str.slice(1)}`;
-  return str;
-}
+// function capitalise(str) {
+//   let str = `${str[0].toUpperCase()}${str.slice(1)}`;
+//   return str;
+// }
 
 // =============> write your explanation here
 // The error happened because 'str' was declared twice, once as a parameter and once with 'let' inside the function.

Sprint-2/1-key-errors/1.js

@@ -13,7 +13,7 @@
 // =============> write your explanation here
 
 // I tried to run the code it gives me SyntaxError,that the decimalNumber has already been declared, we can see in the parameter already has name decimalNumber. 
-// thats why declaring it again inside the function, causes an error.
+// thats why declaring it again inside the function, causes an errors.
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here

Sprint-2/1-key-errors/2.js

@@ -11,7 +11,7 @@
 
 // =============> explain this error message here
 // the parameter can't be a number like (3),also changing num * num to number instead to match the parameter.
-// Finally, correct the code to fix the problem
+// Finally, correct the code to fix the problem.
 
 // =============> write your new code here
 function square(number) {