Integrated: Copy edits, terminology fixes, and factual corrections to the README and the introduction

[Mark Reinhold]

On Thu, 18 Jun 2020 21:37:45 GMT, Mark Reinhold <mr at openjdk.org> wrote:

> - Change “OpenJDK community” to “OpenJDK Community”
> - Omit needless words
> - s/like/such as/g
> - Fix various typos and grammatical errors
> - Tone down “contains the defacto standard” to “suggests”
> - The OpenJDK Community was launched in November 2006, not May 2007

This pull request has now been integrated.

Changeset: f192a324
Author:    Mark Reinhold <mr at openjdk.org>
URL:       https://git.openjdk.java.net/guide/commit/f192a324
Stats:     37 lines in 2 files changed: 0 ins; 1 del; 36 mod

Copy edits, terminology fixes, and factual corrections to the README and the introduction

Reviewed-by: jwilhelm

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PR: https://git.openjdk.java.net/guide/pull/18