Create repo.

README.md

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+# Reference File for NMODL Tests
+One aspect of testing NMODL is golden tests of translated MOD files. These
+"tests" alert the developer that the code generated for a particular MOD file
+changed. This is often desirable, just not without noticing.
+
+This repository stores these reference values and is includes in NMODL via a
+submodule.
+
+Github as a long standing annoying bug that prevents us from fast-forward
+merging PRs. This causes the commit SHA to change on merge. Meaning the SHA in
+the NMODL repo points to the PR branch, not the corresponding commit on `main`.
+
+For out particular usecase, we should require that those commits remain in the
+repo.