Add coverage of Gremlin console color coding settings

[krlawrence]

Should add some coverage of the settings that allow the output from the Gremlin console to be color coded to the Gremlin console introduction section.

[chencjiajy]

I have used in Gremlin console with command :set gremlin.color bg_black,green,bold which is introduced in links, but my Gremlin console still remains black and white. Could you please tell me how you achieve the color coding in your book.

[krlawrence]

The color coding in the book was done using a tool outside the console called Pygments.

This worked fine for me: :set gremlin.color bg_black,green,bold in a Mac Terminal window.

Is it possible your terminal does not have colors enabled?

[chencjiajy]

Thanks for your reply, I also tried it in a Mac Terminal window. I have enabled colors in .bash_profile. Maybe I'll find the reason later