RealMatrix.subtract javadoc typo
--------------------------------

                 Key: MATH-281
                 URL: https://issues.apache.org/jira/browse/MATH-281
             Project: Commons Math
          Issue Type: Bug
            Reporter: Albert Huang
            Priority: Minor


I think the javadoc for RealMatrix.subtract is wrong.  It says "@return this + 
m", which perhaps should be "@return this - m"

Index: src/main/java/org/apache/commons/math/linear/RealMatrix.java
===================================================================
--- src/main/java/org/apache/commons/math/linear/RealMatrix.java        
(revision 799902)
+++ src/main/java/org/apache/commons/math/linear/RealMatrix.java        
(working copy)
@@ -60,7 +60,7 @@
      * Compute this minus m.
      *
      * @param m    matrix to be subtracted
-     * @return     this + m
+     * @return     this - m
      * @throws  IllegalArgumentException if m is not the same size as this
      */
     RealMatrix subtract(RealMatrix m) throws IllegalArgumentException;


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