Update README.md

Small typo
3 years ago · dc48edd7df
1 changed files with 1 additions and 1 deletions
--- a/subjects/union/README.md
+++ b/subjects/union/README.md
@ -6,7 +6,7 @@ Write a program that takes two `string` and displays, without doubles, the chara

 The display will be in the order that the characters will appear on the command line and will be followed by a newline (`'\n'`).

-If the number of arguments is different from 2, then the program displays newline (`'\n'`).
+If the number of arguments is different from 2, then the program displays a newline (`'\n'`).

 ### Usage