Force output on a single line

By explicit formatting.

Inst_eddies/Tests/test_local_extrema.f90

@@ -87,9 +87,10 @@ program test_local_extrema
        'innermost_level'
 
   do i = 1, size(ind_extr, 2)
-     write(unit, fmt = *) ind_extr(1, i), ind_extr(2, i), cyclone(i), &
-          longitude(ind_extr(1, i)), latitude(ind_extr(2, i)), &
-          ssh(ind_extr(1, i), ind_extr(2, i)), innermost_level(i)
+     write(unit, fmt = "(2(i0, 1x), l1, 1x, 4(g13.6, 1x))") ind_extr(1, i), &
+          ind_extr(2, i), cyclone(i), longitude(ind_extr(1, i)), &
+          latitude(ind_extr(2, i)), ssh(ind_extr(1, i), ind_extr(2, i)), &
+          innermost_level(i)
   end do
   close(unit)
   print *, 'Created file "test_local_extrema.csv".'