Version Control With Subversion Source

1.8/zh: translation of chapter 3 in progress

Follow-up to r5406: rewording confusing sentences per review suggestions.

1.8/zh: translation of chapter 3 in progress

Follow-up to r5406: add missing definite articles.

1.8/zh: translation of chapter 3 in progress

1.8/zh: translation of chapter 3 in progress

Follow-up to r5406: fixed a typo.

Issue #270 - New in SVN 1.8: svn client runs in non-interactive mode if
standard input is not a terminal device.

* en/book/ref-svn.xml
- Update `--non-interactive` option reference
(svn.ref.svn.sw.non_interactive).
- Add new `--force-interactive` option reference
(svn.ref.svn.sw.force_interactive).

* en/book/ref-svn.xml
Update `svn help upgrade` output example to match SVN 1.8.

1.8/zh: translation of chapter 3 in progress