Add clean-css advanced optimisations note

diff --git a/README.md b/README.md
index 125c47e..2c81087 100644 (file)
--- a/README.md
+++ b/README.md
@@ -56,7 +56,7 @@ How does HTMLMinifier compare to other solutions — [HTML Minifier from Will Pe
 | `includeAutoGeneratedTags`     | Insert tags generated by HTML parser | `true` |
 | `keepClosingSlash`             | Keep the trailing slash on singleton elements | `false` |
 | `maxLineLength`                | Specify a maximum line length. Compressed output will be split by newlines at valid HTML split-points |
-| `minifyCSS`                    | Minify CSS in style elements and style attributes (uses [clean-css](https://github.com/jakubpawlowicz/clean-css)) | `false` (could be `true`, `Object`, `Function(text)`) |
+| `minifyCSS`                    | Minify CSS in style elements and style attributes (uses [clean-css](https://github.com/jakubpawlowicz/clean-css)). `advanced` optimisations are disabled by default | `false` (could be `true`, `Object`, `Function(text)`) |
 | `minifyJS`                     | Minify JavaScript in script elements and event attributes (uses [UglifyJS](https://github.com/mishoo/UglifyJS2)) | `false` (could be `true`, `Object`, `Function(text, inline)`) |
 | `minifyURLs`                   | Minify URLs in various attributes (uses [relateurl](https://github.com/stevenvachon/relateurl)) | `false` (could be `String`, `Object`, `Function(text)`) |
 | `preserveLineBreaks`           | Always collapse to 1 line break (never remove it entirely) when whitespace between tags include a line break. Must be used in conjunction with `collapseWhitespace=true` | `false` |