In french language, this is not possible to modify
directives. To correct this, you must edit the
files /usr/libexec/webmin/apache/lang/fr (for Fedora) and
find "show_edit=Modification d'une directive Apache"
and change it to "show_edit=Modification d une directive
Apache" (change the ' for a space).
Picture with the bug
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user_id=129364
Thanks .. I will fix this quoting problem in the next Webmin
release.