Consistent usage of String.format().
diff --git a/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java b/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java
index b1bf9d2..33bd001 100644
--- a/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java
+++ b/org.jacoco.core/src/org/jacoco/core/data/ExecutionDataReader.java
@@ -84,9 +84,8 @@
 		}

 		final char version = in.readChar();

 		if (version != ExecutionDataWriter.FORMAT_VERSION) {

-			throw new IOException(String

-					.format("Incompatible format version %x.", Integer

-							.valueOf(version)));

+			throw new IOException(format("Incompatible format version %x.",

+					Integer.valueOf(version)));

 		}

 	}