Clarify operator precedence to fix errorprone error

Errorprone raised error OperatorPrecedence in bazel build.

Change-Id: Ibab601e67d4d5cafe9a7d900c78b0d432181a073
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/internal/transport/ssh/OpenSshConfigFile.java

@@ -881,8 +881,8 @@ public class OpenSshConfigFile implements SshConfigStore {
 		public String substitute(String input, String allowed,
 				boolean withEnv) {
 			if (input == null || input.length() <= 1
-					|| input.indexOf('%') < 0
-							&& (!withEnv || input.indexOf("${") < 0)) { //$NON-NLS-1$
+					|| (input.indexOf('%') < 0
+							&& (!withEnv || input.indexOf("${") < 0))) { //$NON-NLS-1$
 				return input;
 			}
 			StringBuilder builder = new StringBuilder();