Add non-breaking spaces

Add non-breaking spaces before double punctuation (; : ? and !).

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
Fix footnotes

Remove space or period before footnotes to fix invalid layout.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
Insert uicontrol and menucascade tags

Use uicontrol and menucascade tags for GUI menu options.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>
Insert example tags

Use example tags instead of text for examples.

Signed-off-by: Olivier Carrère <carrereo@gmail.com>
Acked-by: Angela Cristina <acristina@redaction-technique.org>