Update test/linalg/test_linalg.fypp

Co-authored-by: Jeremie Vandenplas <jeremie.vandenplas@gmail.com>

Author: adenchfi

test/linalg/test_linalg.fypp

@@ -580,8 +580,8 @@ contains
          end do
       end do
 
-      do j=1, n2
-         do i=1, m2
+      do j = 1, n2
+         do i = 1, m2
             B(i,j) = i*j ! B = [[1, 2, 3], [2, 4, 6]]
          end do
       end do