Handle doubled rule correctly in the compressed formatter if previous

rule ends with an block

Author: volker

src/com/inet/lib/less/CompressCssFormatter.java

@@ -26,7 +26,6 @@
  */
 package com.inet.lib.less;
 
-
 /**
  * A version of the CssFormatter that produce a compressed output.
  */
@@ -148,8 +147,13 @@ private void checkSemicolon() {
     CssFormatter startBlock( String[] selectors ) {
         checkSemicolon();
         CssFormatter formatter = super.startBlock( selectors );
-        if( formatter != this && formatter.getOutput().length() > 0 ) { // two rules with same selector was merged
-            formatter.semicolon();
+        if( formatter != this ) { // two rules with same selector was merged
+            StringBuilder output = formatter.getOutput();
+            int length = output.length();
+            if( length > 0 && output.charAt( length-1 ) != '}' ) {
+                // the previous rule of the same selector ends with a property
+                formatter.semicolon();
+            }
         }
         return formatter;
     }

test/com/inet/lib/less/samples/general/doubleRule2.css

@@ -0,0 +1,11 @@
+@supports selector {
+  surrounding .parentclass {
+    background: red;
+  }
+  surrounding .parentclass .element {
+    display: flex;
+  }
+  surrounding .parentclass .another {
+    border-color: green;
+  }
+}

test/com/inet/lib/less/samples/general/doubleRule2.css_x

@@ -0,0 +1 @@
+@supports selector{surrounding .parentclass{background:#f00}surrounding .parentclass .element{display:flex}surrounding .parentclass .another{border-color:#008000}}

test/com/inet/lib/less/samples/general/doubleRule2.less

@@ -0,0 +1,15 @@
+surrounding {
+    @supports selector {
+        .parentclass {
+            background: red;
+
+            .element {
+                display: flex;
+            }
+
+            .another {
+                border-color: green;
+            }
+        }
+    }
+}