docs(replaceeven): fix typos

subjects/replaceeven/README.md

@@ -2,10 +2,10 @@
 
 ### Instructions
 
-Write a program that takes every character with an even index, of each argument and replace it with the number 2.
+Write a program that takes every character with an even index of each argument and replaces it with the number `2`.
 
-- you program should always print a newline `\n` at the end.
-- you program should print all the arguments in one line, separated by the space character `' '`.
+- Your program should always print a newline `\n` at the end.
+- Your program should print all the arguments in one line, separated by the space character `' '`.
 - `0` is an even number.
 
 
@@ -16,6 +16,6 @@ $ go run . | cat -e
 $
 $ go run . hello 444444444444444 | cat -e
 2e2l2 242424242424242$
-$ go run main.go "Zone 01 is the best" | cat -e
+$ go run . "Zone 01 is the best" | cat -e
 2o2e202 2s2t2e2b2s2$
 ```