Fix firsword

go/tests/prog/firstword_prog/main.go

@@ -8,6 +8,9 @@ import (
 
 func main() {
 	if len(os.Args) == 2 {
-		fmt.Println(strings.Split(strings.TrimSpace(os.Args[1]), " ")[0])
+		s := strings.Split(strings.TrimSpace(os.Args[1]), " ")[0]
+		if s != "" {
+			fmt.Println(s)
+		}
 	}
 }

subjects/firstword/README.md

@@ -2,9 +2,9 @@
 
 ### Instructions
 
-Write a program that takes a `string` and displays its first word, followed by a newline (`'\n'`).
+Write a program that takes an argument and displays its first word, followed by a newline (`'\n'`).
 
-- A word is a section of `string` delimited by spaces or by the start/end of the `string`.
+- A word is a sequence of characters delimited by spaces or by the start/end of the argument.
 
 - The output will be followed by a newline (`'\n'`).