RFR: 8179370: Replace use of <tt>, <center> and <font> tags in java.base

[Mandy Chung]

> On Apr 26, 2017, at 6:49 PM, Jonathan Gibbons <jonathan.gibbons at oracle.com> wrote:
> 
> Updated webrev to address Joe's suggestion to try harder to use {@code} as a substitute for <tt>.
> 
> http://cr.openjdk.java.net/~jjg/8179370/webrev.01

Looks good.
Mandy