diff --git a/example_code/matmul_test.cpp b/example_code/matmul_test.cpp
index 8976785..7ee4e01 100644
--- a/example_code/matmul_test.cpp
+++ b/example_code/matmul_test.cpp
@@ -1,5 +1,5 @@
 /******************************************************************************************************
-  July 10, 2017
+  July 26, 2018
 
   Ian A. Cosden
   Princeton University
diff --git a/example_code/mm.h b/example_code/mm.h
index e496e05..cc23387 100644
--- a/example_code/mm.h
+++ b/example_code/mm.h
@@ -1,13 +1,13 @@
 /******************************************************************************************************
-  July 10, 2017
+  July 23, 2017
 
   Ian A. Cosden
   Princeton University
   icosden@princeton.edu
 
-  Sample Matrix-Matrix multiplication code for CoDaS-HEP Summer School 
+  Sample Matrix-Matrix multiplication code for CoDaS-HEP Summer School
+
 
-      
 *******************************************************************************************************/
 
 
@@ -41,7 +41,7 @@ void mm2(double **A, double **B, double **C, int matrix_size) {
 	}
       }
     }
-    
+
 }
 
 //1D matrix-matrix multiplication
@@ -69,15 +69,15 @@ void mm4(double *a, double *b, double *c, int matrix_size) {
 
 //function to print a few elements to std out to use as a check (2D version)
 void print_check(double **Z, int matrix_size) {
-  
+
   cout<<Z[0][0]<<" "<<Z[1][1]<<" "<<Z[2][2]<<endl;
 }
 
 //function to print a few elements to std out to use as a check (1D version)
 void print_check_1D(double *Z, int matrix_size) {
-  
+
   cout<<Z[0]<<" "<<Z[matrix_size+1]<<" "<<Z[2*matrix_size+2]<<endl;
-  
+
 }
 
 
@@ -87,7 +87,7 @@ void zero_result(double **C, int matrix_size) {
     for (int j = 0;  j < matrix_size; j++) {
         C[i][j] = 0.0;
     }
-  }  
+  }
 }
 
 //zeros all elements of input array (1D version)
@@ -95,4 +95,4 @@ void zero_result_1D(double *C, int matrix_size) {
   for (int i = 0 ; i < matrix_size*matrix_size; i++) {
         C[i] = 0.0;
     }
-  }  
+  }