String.indexOf can be replaced with String.contains

Change-Id: Ie9e8c5d1d49ecba0199a44da2247b6bb382acaaa
Signed-off-by: Carsten Hammer <carsten.hammer@t-online.de>
diff --git a/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/resources/ProjectPathVariableManager.java b/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/resources/ProjectPathVariableManager.java
index 0db14dc..4dcbc17 100644
--- a/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/resources/ProjectPathVariableManager.java
+++ b/bundles/org.eclipse.core.resources/src/org/eclipse/core/internal/resources/ProjectPathVariableManager.java
@@ -114,7 +114,7 @@
 	public URI getURIValue(String varName) {
 		String value = internalGetValue(varName);
 		if (value != null) {
-			if (value.indexOf("..") != -1) { //$NON-NLS-1$
+			if (value.contains("..")) { //$NON-NLS-1$
 				// if the path is 'reducible', lets resolve it first.
 				int index = value.indexOf(IPath.SEPARATOR);
 				if (index > 0) { // if its the first character, its an