fix(tvix/eval): update identifier quoting to match cppnix 2.17 r/6589

In cppnix 2.17, commit b72bc4a972fe568744d98b89d63adcd504cb586c, the
libexpr pretty-printing routine was fixed so that it would no longer
pretty-print attrsets with keywords in their attrnames incorrectly.

This commit implements the corresponding fix for tvix, fixes our
tests to work with cppnix>=2.17 oracles, and expands our test cases
to cover all the keywords.

Change-Id: I4b51389cd3a9c44babc8ab2a84b383b7b0b116ca
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9283
Autosubmit: Adam Joseph <adam@westernsemico.com>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI

1 files changed, 1 insertions, 0 deletions

diff --git a/tvix/eval/src/tests/tvix_tests/identity-quoted-attrname-let.nix b/tvix/eval/src/tests/tvix_tests/identity-quoted-attrname-let.nix
new file mode 100644
index 000000000000..196ec7cc887f
--- /dev/null
+++ b/tvix/eval/src/tests/tvix_tests/identity-quoted-attrname-let.nix
@@ -0,0 +1 @@
+{ "let" = true; }