<commit_before>This is the most vanilla example of all. We are simply
calling the Fortran `example` module from a Fortran program:

```
$ make run-fortran
------------------------------------------------------------
quux = foo(1.000000, 16.000000) = 61.000000
------------------------------------------------------------
quuz = make_udf(1.250000, 5.000000, 1337)
     = UserDefined(1.250000, 5.000000, 1337)
------------------------------------------------------------
foo_array(
    4,
    [[3.000000, 4.500000],
     [1.000000, 1.250000],
     [9.000000, 0.000000],
     [-1.000000, 4.000000]],
) =
    [[6.000000, 9.000000],
     [2.000000, 2.500000],
     [18.000000, 0.000000],
     [-2.000000, 8.000000]]
------------------------------------------------------------
ptr_as_int = c_loc(made_it)  ! type(c_ptr) / integer(c_intptr_t) / integer(kind=8)
ptr_as_int = 140726916390992  ! 0x7FFD89DCA050
udf_ptr(ptr_as_int)  ! Set memory in ``made_it``
made_it = UserDefined(3.125000, -10.500000, 101)
------------------------------------------------------------
just_print()<commit_msg>Adding distinction to Fortran README about **where** Makefile is.<commit_after>This is the most vanilla example of all. We are simply
calling the Fortran `example` module from a Fortran program:

```
$ cd .. && make run-fortran
------------------------------------------------------------
quux = foo(1.000000, 16.000000) = 61.000000
------------------------------------------------------------
quuz = make_udf(1.250000, 5.000000, 1337)
     = UserDefined(1.250000, 5.000000, 1337)
------------------------------------------------------------
foo_array(
    4,
    [[3.000000, 4.500000],
     [1.000000, 1.250000],
     [9.000000, 0.000000],
     [-1.000000, 4.000000]],
) =
    [[6.000000, 9.000000],
     [2.000000, 2.500000],
     [18.000000, 0.000000],
     [-2.000000, 8.000000]]
------------------------------------------------------------
ptr_as_int = c_loc(made_it)  ! type(c_ptr) / integer(c_intptr_t) / integer(kind=8)
ptr_as_int = 140726916390992  ! 0x7FFD89DCA050
udf_ptr(ptr_as_int)  ! Set memory in ``made_it``
made_it = UserDefined(3.125000, -10.500000, 101)
------------------------------------------------------------
just_print()
{'fraction_non_alphanumeric': 0.38323621694307486, 'fraction_numerical': 0.19184222321828776, 'mean_word_length': 1.3274244004171012, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '5477492', 'n_tokens_mistral': 996, 'n_tokens_neox': 676, 'n_words': 146}