fixup! env.md documents the new env var

docs/env.md

@@ -265,6 +265,26 @@ have any unexpected errors.
 
 The default is `undefined`.
 
+## SUPPRESS_NODE_ERROR_TAMING
+
+Affects the linenumbers shown in stacktraces for TypeScript tests run on Ava
+under Node. Stacktraces may contain text like
+```
+boot/test/bootstrapTests/stack-linenumbers.test.ts:1:104
+```
+where all TypeScript locations are misreported as on line 1.
+***During development only*** when you're willing to sacrifice security for
+a more pleasant development experience, setting the environment variable
+`SUPPRESS_NODE_ERROR_TAMING` to `'enable'`, such as by
+```sh
+$ export SUPPRESS_NODE_ERROR_TAMING=enabled
+```
+should cause such stacktrace text to instead look like
+```
+boot/test/bootstrapTests/stack-linenumbers.test.ts:40:32
+```
+with correct positions into the TypeScript source.
+
 ## SWINGSET_WORKER_TYPE
 
 Affects: solo, unit tests