Fix wrong braces and add 1st line for consistency

I spotted and fixed incorrect braces.

The first HDF5 line seen in all h5dump outputs was included, for the consistency with other HDF5 examples.

src/VTKFileFormats.md

@@ -1309,6 +1309,7 @@ The Overlapping AMR data file is an AMR Guaussian Pulse source with two levels
 `Data` are not displayed for readibility.
 
 ```
+HDF5 "./ExternalData/Testing/Data/amr_gaussian_pulse.hdf" {
 GROUP "/" {
    GROUP "VTKHDF" {
       ATTRIBUTE "Origin" {
@@ -1419,10 +1420,10 @@ GROUP "/" {
             DATASET "Coord Result" {
                DATATYPE  H5T_IEEE_F64LE
                DATASPACE  SIMPLE { ( 770 ) / ( 770 ) }
-               }
             }
          }
       }
    }
 }
+}
 ```