doc: add link to [customizing util.inspect colors].

[jmm]

Previously this said "see below" to nowhere.

I have the same thing for v4.x.

1. Another option would be to link to the util.inspect() documentation for all of the options (showHidden|depth|colors) instead of duplicating them (that'd be my preference, unless the build system can accomodate that content being located in one place and inserted in both places in the output).

2. The task for building the docs depends on building Node? That is prohibitively slow for making docs changes. (I'm doing it where I already have a functioning Node installation.) I had to hack the build scripts to get around that to be able to make these changes, and I wouldn't attempt this again without being able to build them using the existing Node install. It's possible I've misunderstood or done something wrong -- I just followed the instructions from the README: $ make doc.

3. What does CONTRIBUTING.md mean?:

   The rules for the master branch are less strict;

   Less strict than what?

[Trott]

I think you want to target the pull request against master rather than v5.x.

[mikeal]

Everything lands in master and then is cherry-picked into a release branch unless it is for an issues specific to that release line.

[Fishrock123]

@jmm Could you please open a new Pull Request with the merge base / target set to master? Thanks!

[jmm]

Thanks @Trott @mikeal @Fishrock123. I actually saw that (it's right above the part that I linked to), but lost track of it obviously. Sorry about that. I pushed the original commit here again so it's not showing 56 participants anymore (I hope those people didn't get spammed as a result of that...ugh).

@Fishrock123 Opened #3749.