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Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

Not everyone uses rvm and the library has already got a function for this.

Add spaces before bullet-points to more easily distinguish them from one another and the rest of the prompt when using smaller font-sizes and do not add a blank line prior to prompt output; if there's a desire for spacing, one can use their terminal's line-height to achieve this.