The ctests are not convenient tests. In this file we can attempt to log the
benefits and costs to using them so we can periodically evaluate which tests we
should keep and which we should get rid of.

Below are some objective costs:

- The time it takes to run the ctests.
- The email discussion back-and-forth.

There are also some non-objective costs. The ctests are annoying and not fun to
maintain, discuss, and fix. Although it's hard to measure this "annoyance"
cost, it should be taken into account when we review.

Below we can try to keep a log of which bugs are found with which ctests. This
way we can see which tests are the most useful. It is difficult to objectively
differentiate between minor bugs and important bugs.

The "Benefit" row gives the amount of days in-between when an issue is found
because of the ctests and when an issue is reported by someone not using the
ctests.

Examples where convergence tests took time and annoyance to figure out that
they were actually "false positives" (i.e., no bug that is worth the time or
complexity to fix):

https://www.mail-archive.com/search?l=mid&q=20210125200655.e27xaaoy2belyxhw%40tallinn


Examples where bugs were fixed (more quickly) because of ctests:

Report : https://www.mail-archive.com/search?l=mid&q=20210126190837.pwuxhrhrikzszfrh%40tallinn
Fix    : 92f8612a

Report : https://www.mail-archive.com/search?l=mid&q=b0a33192bc5635bd1cb5596e346f9c34615ffeb4.camel%40lyx.org
Fix    : ab1d418f

Fix    : ef2b2827

Fix    : 1ddc1c6b

Report : https://www.mail-archive.com/search?l=mid&q=20210218051838.jbwnemfv5ilhlsls%40tallinn
Fix    : 358e4ace

Fix    : 3df42924

Fix    : 67d0b80f

Fix    : 8ce6c815

Report : https://www.mail-archive.com/search?l=mid&q=20210523014926.xewdr5x62br2okvy%40tallinn
Fix    : 39a9e370

Report : https://www.mail-archive.com/search?l=mid&q=20210528001413.56phju7dvfn4dexs%40tallinn
Fix    : ffa6a724

Report : https://www.mail-archive.com/search?l=mid&q=20210529174524.idnmt5w4tvhuvyy6%40tallinn
Note1  : We are still not sure what to do regarding how to make it more user-friendly
         for users to realize that "-dALLOWPSTRANSPARENCY" is needed for the ps2pdf converter.
Benefit: 14 days (https://www.lyx.org/trac/ticket/12303)

Report : https://www.mail-archive.com/search?l=mid&q=20211205190238.edrtqmg3fkdr7gbo%40poole
Fix    : 489bf46a, e3489d54


Examples where upstream (e.g., LaTeX packages) bugs were fixed (more quickly)
because of ctests:

Fix    : https://github.com/nrnrnr/noweb/pull/12#event-4892099481