Bash Prompt

I think a person’s command-line prompt says a lot about them.  Some people have big fancy prompts with tidbits of data; some people have simple black & white prompts.  Some people like fancy or frivolous things like smiley and frowny faces based on the error status of the last command; some people are strictly utilitarian.  I mostly fall into the last category – I like some color with my prompts when possible, but otherwise I only want to see my name, server, cwd, and VCS branch (if any).
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