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## firstword
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### Instructions
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Write a program that takes an argument and displays its first word, followed by a newline (`'\n'`).
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- A word is a sequence of characters delimited by spaces or by the start/end of the argument.
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- The output will be followed by a newline (`'\n'`).
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- If the number of arguments is not 1, or if there are no words, the program displays nothing.
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### Usage
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```console
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student@ubuntu:~/[[ROOT]]/test$ go build
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student@ubuntu:~/[[ROOT]]/test$ ./test "hello there"
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hello
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student@ubuntu:~/[[ROOT]]/test$ ./test "hello ......... bye"
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hello
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student@ubuntu:~/[[ROOT]]/test$ ./test
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student@ubuntu:~/[[ROOT]]/test$ ./test "hello" "there"
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student@ubuntu:~/[[ROOT]]/test$
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```
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