reformat cj.c

[badasahog]

nobody but me has touched this file in over a year, so it seemed a reasonable candidate to be reformatted and fixed up.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.13%. Comparing base (bc7f5af) to head (b2849e6).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #7397   +/-   ##
=======================================
  Coverage   99.13%   99.13%           
=======================================
  Files          85       85           
  Lines       16610    16610           
=======================================
  Hits        16466    16466           
  Misses        144      144           

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[github-actions]

No obvious timing issues in HEAD=cjreformat

Generated via commit b2849e6

Download link for the artifact containing the test results: ↓ atime-results.zip

Task	Duration
R setup and installing dependencies	5 minutes and 8 seconds
Installing different package versions	10 minutes and 26 seconds
Running and plotting the test cases	2 minutes and 40 seconds