4567 - support automated tests in SubX

All it takes is to code-generate a simple function called 'run_tests' that
calls all functions starting with 'test_' one by one.

I've temporarily switched the factorial app to run as a test. But that's
temporary, because all the code to print '.' vs 'F' needs to get extracted
out into a helper.

1 files changed, 0 insertions, 0 deletions

diff --git a/subx/apps/factorial b/subx/apps/factorial
index e60e7d21..15fa68ec 100755
--- a/subx/apps/factorial
+++ b/subx/apps/factorial
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