Fix failures with EditLine

On macOS with EditLine:
```
$ ruby -r readline -e 'Readline.readline("> "); p Readline::VERSION' < /dev/null
"EditLine wrapper"
```

On Linux with GNU readline:
```
$ ruby -r readline -e 'Readline.readline("> "); p Readline::VERSION' < /dev/null
> "8.0"
```

1 files changed, 1 insertions, 1 deletions

diff --git a/spec/bundler/commands/show_spec.rb b/spec/bundler/commands/show_spec.rb
index 30e9de9686..2adb121616 100644
--- a/spec/bundler/commands/show_spec.rb
+++ b/spec/bundler/commands/show_spec.rb
@@ -173,7 +173,7 @@ RSpec.describe "bundle show", :bundler => "< 3" do
       G
 
       bundle "show rac"
-      expect(out).to eq "1 : rack\n2 : rack-obama\n0 : - exit -\n>"
+      expect(out).to match(/\A1 : rack\n2 : rack-obama\n0 : - exit -(\n>)?\z/)
     end
   end