Small changes in response to review.

pkgs/development/ruby-modules/bundled-common/default.nix

@@ -140,7 +140,7 @@ let
           name = "${pname}-interactive-environment";
           nativeBuildInputs = [ wrappedRuby basicEnv ];
           shellHook = ''
-            export OLD_IRBRC="$IRBRC"
+            export OLD_IRBRC=$IRBRC
             export IRBRC=${irbrc}
           '';
           buildCommand = ''

pkgs/development/ruby-modules/runtests.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 set -o xtrace
-pwd
+cd $(dirname $0)
 find . -name text.nix
 testfiles=$(find . -name test.nix)
 nix-build -E "with import <nixpkgs> {}; callPackage testing/driver.nix { testFiles = [ $testfiles ]; }" --show-trace && cat result

pkgs/development/ruby-modules/testing/tap-support.nix

@@ -5,8 +5,8 @@ let
   testLine = report: "${okStr report} ${toString (report.index + 1)} ${report.description}" + testDirective report + testYaml report;
 
   # These are part of the TAP spec, not yet implemented.
+  #c.f.  https://github.com/NixOS/nixpkgs/issues/27071
   testDirective = report: "";
-
   testYaml = report: "";
 
   okStr = { result, ...}: if result == "pass" then "ok" else "not ok";