feat(setspace): remove typos and errors in expected output

subjects/setspace/README.md

@@ -4,13 +4,13 @@
 
 Write a function that takes a PascalCase `string` and returns the same `string` with a space between each word.
 
-- The function must return an empty `string` if the input `string` is empty.
+- The function must return an empty `string` if the input is an empty `string`.
 
 - The function must return `"Error"` if the input `string` is not a PascalCase `string`.
 
-- The PascalCase begins with a capital letter, and each word begins with a capital letter without a space between them for example: `"HelloWorld`"` is a valid PascalCase `string`.
+- The PascalCase begins with a capital letter, and each word begins with a capital letter without a space between them, for example: "HelloWorld" is a valid PascalCase `string`.
 
-- The PascalCase cannot contain any non-alphabetic character, for example: `"Hello World12`" is not a valid PascalCase `string`.
+- The PascalCase cannot contain any non-alphabetic character, for example: "Hello World12" is not a valid PascalCase `string`.
 
 ### Expected function
 
@@ -46,10 +46,10 @@ And its output:
 
 ```console
 $ go run . | cat -e
-Hello World
+Hello World$
 Error$
 Error$
-
+$
 Lorem Ipsum Word$
 $
 ```