mediawiki.mixins.less: Add a link to source of the .background-image-svg technique

http://pauginer.tumblr.com/post/36614680636/invisible-gradient-technique

Change-Id: I2418f7704fef31d3a3bee8eed5e8bfb628086df3

diff --git a/resources/mediawiki.less/mediawiki.mixins.less b/resources/mediawiki.less/mediawiki.mixins.less
index e21d21b..d116008 100644 (file)
--- a/resources/mediawiki.less/mediawiki.mixins.less
+++ b/resources/mediawiki.less/mediawiki.mixins.less
@@ -28,6 +28,7 @@
 }
 
 /* Note gzip compression means that it is okay to embed twice */
+/* http://pauginer.tumblr.com/post/36614680636/invisible-gradient-technique */
 .background-image-svg(@svg, @fallback) {
        background-image: url(@fallback);
        /* SVG support using a transparent gradient to guarantee cross-browser