ruby: 0000-fundamentals.rb: whitespace clean up
ruby: 0000-fundamentals.rb: whitespace clean up

Vim scanning found some whitespace errors. This patch is created to
perform a clean up for these errors.

Signed-off-by: (Holloway) Chew, Kean Ho <bbd8faa40b0f348214bf4124b281a301299ba6dd@gmail.com>

josiahsoh/learning,hollowaykeanho/learning,hollowaykeanho/learning,hollowaykeanho/learning,josiahsoh/learning,josiahsoh/learning,hollowaykeanho/learning,josiahsoh/learning,hollowaykeanho/learning,josiahsoh/learning