Bug 9159 Classpath wizard should not complain when adding missing source folder
Build 20020125 - Define a project A with source folder 'src1'. - Go to the .classpath file and edit it to insert one extra line: <classpathentry kind="src" path="src2"/> below the line referring to first source folder: <classpathentry kind="src" path="src1"/>. - Now, try to add this missing source folder 'src2', it isn't allowed by the wizard, one has to add a basic folder instead. Note: It is not such an uncommon scenario, the classpath modification could simply occur by catching up with a shared classpath having one more source folder on it, and which is locally missing.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/wizards/buildpaths/CPListLabelProvider.java
String[] args= new String[] { path.lastSegment(), path.removeLastSegments(1).makeRelative().toString() };
							return NewWizardMessages.getFormattedString("CPListLabelProvider.twopart", args); 
						}
					} else {
						if (ArchiveFileFilter.isArchivePath(path)) {
							String[] args= new String[] { path.lastSegment(), path.removeLastSegments(1).toOSString() };
							return NewWizardMessages.getFormattedString("CPListLabelProvider.twopart", args); 
						}
					}
					
					return path.makeRelative().toString();									
				}
				case IClasspathEntry.CPE_VARIABLE: {
					String name= path.makeRelative().toString();
					StringBuffer buf= new StringBuffer(name);
					IPath entryPath= JavaCore.getClasspathVariable(path.segment(0));
					if (entryPath != null) {
						buf.append(" - "); 
						buf.append(entryPath.append(path.removeFirstSegments(1)).toOSString());
					}
					return buf.toString();
				}
				case IClasspathEntry.CPE_PROJECT:
					return path.lastSegment();
				case IClasspathEntry.CPE_SOURCE: {
					StringBuffer buf= new StringBuffer(path.makeRelative().toString());
					IResource resource= cpentry.getResource();
					if (resource != null && !resource.exists()) {
						buf.append(' ');
						buf.append(fNewLabel);