shorter lines, and alignment in text messages. rewrite
fr/install.html.

 - mostly undo fde7e5a6 in inc/lang/fr/newpage.txt
 - restore formatting and author of d9de855c

 - mostly undo fde7e5a6
 - restore author and formatting of de78e4ef

 - mostly undo fde7e5a6 for inc/lang/fr/pwconfirm.txt
 - apply short line length to all lines

 - mostly undo fde7e5a6 for inc/lang/fr/revisions.txt
 - restore text and author of c1fe9e9f

 - mostly undo fde7e5a6 for inc/lang/fr/recent.txt
 - restore d288e197 text and author

This undoes the change in alignments. Those are useful when displaying
text only emails in a monospace font.

As discussed in https://github.com/splitbrain/dokuwiki/pull/2462#issuecomment-413786942

The newlines serve the goal of keeping textlengths reasonably short in
text only mails.

This change was done by reverting the files back to the current master.

As discussed in https://github.com/splitbrain/dokuwiki/pull/2462#issuecomment-413786942

This applies a lot of formatting fixes on the language files:

1. In EOF - trimmed all empty lines except one
2. After the title - one empty line strictly
3. Corrected links to national versions of documents in dokuwiki.org if
   they exits - 4example [[doku>namespaces]] to [[doku>ar:namespaces]]
4. Corrected some over-auto-translated links to "playground:playground"
   and "wiki:syntax"
5. Torn lines are collected in one in a large number of places (except
   for RTL languages)
6. Removed e-mail signatures that now is missing in the English set of
   files