MediaWiki:Gadget-Long-Image-Names-in-Categories.css

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/* Long filenames on category pages */
#mw-category-media .galleryfilename-truncate,
/* Long filenames on special pages (new files etc.) */
.ns-special .galleryfilename-truncate {
    white-space: normal; 
    overflow: visible;
    display: inline;
}

#mw-category-media .galleryfilename-truncate:after,
.ns-special .galleryfilename-truncate:after {
    content: '\A';
    white-space: pre;
    white-space: pre-wrap; /* Workaround for Chromium bug which seems to apply the rule to the whole line, breaking text wrapping with 'pre' */
}