### Eclipse Workspace Patch 1.0
#P org.eclipse.jdt.ui
Index: ui/org/eclipse/jdt/internal/ui/propertiesfileeditor/PropertiesFileAutoEditStrategy.java
===================================================================
RCS file: /cvsroot/eclipse/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/propertiesfileeditor/PropertiesFileAutoEditStrategy.java,v
retrieving revision 1.1
diff -u -r1.1 PropertiesFileAutoEditStrategy.java
--- ui/org/eclipse/jdt/internal/ui/propertiesfileeditor/PropertiesFileAutoEditStrategy.java	22 Oct 2010 11:26:49 -0000	1.1
+++ ui/org/eclipse/jdt/internal/ui/propertiesfileeditor/PropertiesFileAutoEditStrategy.java	23 Oct 2010 04:58:58 -0000
@@ -26,20 +26,23 @@
 	 * @see org.eclipse.jface.text.IAutoEditStrategy#customizeDocumentCommand(org.eclipse.jface.text.IDocument, org.eclipse.jface.text.DocumentCommand)
 	 */
 	public void customizeDocumentCommand(IDocument document, DocumentCommand command) {
-		command.text= escape(command.text);
+		String text= command.text;
+		if (text.equals(escape(text, false)))
+			return;
+		command.text= escape(text, text.length() > 1);
 	}
 
-	private static String escape(String s) {
+	private static String escape(String s, boolean escapeSlash) {
 		StringBuffer sb= new StringBuffer(s.length());
 		int length= s.length();
 		for (int i= 0; i < length; i++) {
 			char c= s.charAt(i);
-			sb.append(escape(c));
+			sb.append(escape(c, escapeSlash));
 		}
 		return sb.toString();
 	}
 
-	private static String escape(char c) {
+	private static String escape(char c, boolean escapeSlash) {
 		switch (c) {
 			case '\t':
 				return "\t";//$NON-NLS-1$
@@ -50,8 +53,10 @@
 			case '\r':
 				return "\r";//$NON-NLS-1$
 			case '\\':
-				return "\\";//$NON-NLS-1$
-
+				if (escapeSlash)
+					return "\\\\";//$NON-NLS-1$
+				else
+					return "\\"; //$NON-NLS-1$
 			default:
 				return PropertiesFileEscapes.escape(c);
 		}