Don't try to create directories with the same names as files

[twilight-sparkle-irl]

No description provided.

[codecov]

Codecov Report

Merging #1 into master will decrease coverage by 7.30002%.
The diff coverage is n/a.

@@                 Coverage Diff                 @@
##              master          #1         +/-   ##
===================================================
- Coverage   78.20256%   70.90254%   -7.30002%     
===================================================
  Files             57          57                 
  Lines           4996        4997          +1     
===================================================
- Hits            3907        3543        -364     
- Misses          1089        1454        +365

Impacted Files	Coverage Δ
src/fingerprints/BOOL/BOOL.c	0% <0%> (-100%)	⬇️
lib/libghthash/hash_functions_priv.h	0% <0%> (-100%)	⬇️
src/instructions/execute.c	0% <0%> (-80%)	⬇️
lib/libghthash/hash_table_priv.h	14.58333% <0%> (-34.58335%)	⬇️
src/instructions/iterate.c	65.21738% <0%> (-30.43479%)	⬇️
src/fingerprints/TURT/TURT.c	71.23287% <0%> (-22.26028%)	⬇️
src/fingerprints/FILE/FILE.c	67.14286% <0%> (-21.42858%)	⬇️
src/fingerprints/REFC/REFC.c	70.58824% <0%> (-20.58823%)	⬇️
src/instructions/io.c	68.57143% <0%> (-20%)	⬇️
src/fingerprints/DIRF/DIRF.c	80.76922% <0%> (-19.23078%)	⬇️
... and 24 more

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[VorpalBlade]

While this in principle looks good, I'm quite confused as to why it seems to break code coverage. That needs to be fixed before this can be merged.

EDIT: Aha, looking at the travis CI output it seems that it fails to run the tests at all:

https://travis-ci.org/VorpalBlade/cfunge/jobs/610594964:

[...]
Traceback (most recent call last):
  File "/home/travis/build/VorpalBlade/cfunge/tests/test_runner.py", line 110, in <module>
    main()
  File "/home/travis/build/VorpalBlade/cfunge/tests/test_runner.py", line 78, in main
    '-s', _SUFFIX_MAP[test_extension],
KeyError: 'b98_dir'
      Start  2: bounds.b98
 2/33 Test  #2: bounds.b98 .......................***Failed    0.11 sec
[...]

This is probably the cause of the issue. Why this doesn't cause the travis build to fail as well is strange (and something I'll try to look into when I have time).

Either way, as soon as the tests and code coverage is fixed it should be possible to merge.