Add note for comments that survive minifying

diff --git a/README.md b/README.md
index 64177f6..0ca810f 100644 (file)
--- a/README.md
+++ b/README.md
@@ -37,6 +37,13 @@ Or even gzip it at once:
     var source = "a{font-weight:bold;}";
     var minimized = cleanCSS.process(source);
 
+### How do you preserve a comment block? ###
+
+    /*!
+
+    Important comments included in minified output.
+    */
+
 ### How to run clean-css tests? ###
 
 You need vows testing framework (npm install vows) then simply run: