maxb. Patch cleanup by maxb.
* src/en/book/appa.xml
(svn.forcvs.revnums): Rephrase to avoid the misconception that CVS
still uses rcs(1) as a backend. (Wording by sussman.)
* src/en/book/ch02.xml
(svn.basic.repository): Replace "they" with "he" when talking about a
user. Mixing he/she instead of using "they" is used other places in
the book.
(svn.basic.in-action.revs): Use plural form of "user".
* src/en/book/ch03.xml
(svn.tour.revs.keywords): Remove superfluous periods in screen
example.
(svn.tour.history): Mention that "svn log" also lists author and date
information.
* src/en/book/ch04.xml
(svn.branchmerge.copychanges.specific): Rephrase and also mention that
merging also affects properties.
(svn.branchmerge.copychanges.bestprac.preview,
svn.branchmerge.copychanges.bestprac.ancestry): Add missing
<literal>s. Turn a status output from <literal> into <screen> to
retain whitespace.
(svn.branchmerge.commonuses.resurrect): Add missing period.
(svn.branchmerge.switchwc): Add missing <literal>s.
(svn.branchmerge.tags.mkcomplex): Say that regular diffs don’t show
changes in symlinks and properties neither.
(svn.branchmerge.maint.layout): Changed "they/their" to "she/her" when
talking about a user.
(svn.branchmerge.maint.lifetime): Add three words to a sentence.
* src/en/book/ch05.xml
(svn.reposadmin.maint.diskspace): Move period outside <quote>.
(svn.reposadmin.maint.migrate): Move period outside parentheses.
Revisions are copied, not moved into the repository from a dump
file.
* src/en/book/ch06.xml
(svn.serverconfig.netmodel.credcache,
svn.serverconfig.svnserve.auth.users,
svn.serverconfig.svnserve.sshauth, svn.serverconfig.httpd,
svn.serverconfig.httpd.authn.sslcerts): Move period outside
parentheses.
(svn.serverconfig.svnserve.invoking.sb-1,
svn.serverconfig.multimethod): Insert space into "BerkeleyDB".
