Issue #2065: Add suppression for IntelliJ IDEA inspection as comment

config/intellij-idea-inspections.xml

@@ -1972,7 +1972,6 @@
                 <option value="deprecation" />
                 <option value="unchecked" />
                 <option value="rawtypes" />
-                <option value="idea: CollectionDeclaredAsConcreteClass" />
             </list>
         </option>
     </inspection_tool>

src/main/java/com/puppycrawl/tools/checkstyle/PropertiesExpander.java

@@ -37,8 +37,8 @@ public final class PropertiesExpander
      * @param properties the underlying properties to use for
      *     property resolution.
      * @throws IllegalArgumentException indicates null was passed
+     * @noinspection IDEA CollectionDeclaredAsConcreteClass
      */
-    @SuppressWarnings("idea: CollectionDeclaredAsConcreteClass")
     public PropertiesExpander(Properties properties) {
         if (properties == null) {
             throw new IllegalArgumentException("cannot pass null");