Add better syntax highlighting and footer

 GETTING_STARTED.md
 [ci skip]

Author: zbeekman

GETTING_STARTED.md

@@ -59,7 +59,7 @@ the use of an OCA compiler (e.g., gfortran 5.1.0 or later) in a Linux bash shell
 with the `bin` directory of the chosen installation path in the user's PATH
 environment variable:
 
-```
+```fortran
 $ cat tally.f90
       program main
         use iso_c_binding, only : c_int
@@ -106,16 +106,23 @@ name clashes with the compiler's or programs existing capabilities.
 If the `caf` compiler wrapper cannot process the source code in question, invoke
 the underlying communication library directly:
 
-```
+```bash
 mpif90 -fcoarray=lib -L/opt/opencoarrays/ tally.f90 \ -lcaf_mpi -o htally-I<OpenCoarrays-install-path>/mod
 ```
 
 and also run the program with the lower-level communication library:
 
-```
+```bash
 mpirun -np <number-of-images> ./tally
 ```
 
+---
+
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+
 [Hyperlinks]:#
 
 [The caf compiler wrapper]: #the-caf-compiler-wrapper