diff --git a/src/java/org/apache/commons/math/stat/inference/UnknownDistributionChiSquareTest.java b/src/java/org/apache/commons/math/stat/inference/UnknownDistributionChiSquareTest.java
index 1429fd332..432e13c13 100644
--- a/src/java/org/apache/commons/math/stat/inference/UnknownDistributionChiSquareTest.java
+++ b/src/java/org/apache/commons/math/stat/inference/UnknownDistributionChiSquareTest.java
@@ -61,7 +61,7 @@ public interface UnknownDistributionChiSquareTest extends ChiSquareTest {
      * @throws IllegalArgumentException if preconditions are not met
      */
     double chiSquareDataSetsComparison(long[] observed1, long[] observed2)
-    	throws IllegalArgumentException;
+        throws IllegalArgumentException;
 
     /**
      * <p>Returns the <i>observed significance level</i>, or <a href=
@@ -100,7 +100,7 @@ public interface UnknownDistributionChiSquareTest extends ChiSquareTest {
      * @throws MathException if an error occurs computing the p-value
      */
     double chiSquareTestDataSetsComparison(long[] observed1, long[] observed2)
-    	throws IllegalArgumentException, MathException;
+      throws IllegalArgumentException, MathException;
 
     /**
      * <p>Performs a Chi-Square two sample test comparing two binned data
@@ -138,6 +138,6 @@ public interface UnknownDistributionChiSquareTest extends ChiSquareTest {
      * @throws MathException if an error occurs performing the test
      */
     boolean chiSquareTestDataSetsComparison(long[] observed1, long[] observed2, double alpha)
-    	throws IllegalArgumentException, MathException;
+      throws IllegalArgumentException, MathException;
 
 }
diff --git a/src/java/org/apache/commons/math/util/MathUtils.java b/src/java/org/apache/commons/math/util/MathUtils.java
index d7008dc1e..9eba650a3 100644
--- a/src/java/org/apache/commons/math/util/MathUtils.java
+++ b/src/java/org/apache/commons/math/util/MathUtils.java
@@ -532,7 +532,7 @@ public final class MathUtils {
      * @return the value of the logarithm - the number y such that base^y = x.
      */ 
     public static double log(double base, double x) {
-    	return Math.log(x)/Math.log(base);
+        return Math.log(x)/Math.log(base);
     }
 
     /**