IDEA-86633 Javadoc copy puts a non-lower-ascii character on the clipboard

  symbols are replaced by raw white spaces at the copied javadoc text now

platform/lang-impl/src/com/intellij/codeInsight/documentation/DocumentationComponent.java

@@ -328,7 +328,9 @@ public class DocumentationComponent extends JPanel implements Disposable, DataPr
   @Override
   public Object getData(@NonNls String dataId) {
     if (DocumentationManager.SELECTED_QUICK_DOC_TEXT.getName().equals(dataId)) {
-      return myEditorPane.getSelectedText();
+      // Javadocs often contain   symbols (non-breakable white space). We don't want to copy them as is and replace
+      // with raw white spaces. See IDEA-86633 for more details.
+      return myEditorPane.getSelectedText().replace((char)160, ' ');
     }
      
     return null;