178392454e
This patch addresses an issue with lit's internal shell when env is without any arguments, it fails with exit code 127 because `env` requires a subcommand. This patch addresses the issue by encoding the command to properly return environment variables even when no arguments are provided. The error occurred when running the command ` LIT_USE_INTERNAL_SHELL=1 ninja check-llvm`. fixes: #102383 This is part of the test cleanups proposed in the RFC: [[RFC] Enabling the Lit Internal Shell by Default](https://discourse.llvm.org/t/rfc-enabling-the-lit-internal-shell-by-default/80179)