Fix broken Bash completion end-to-end test.

scripts/run-full-tests

@@ -11,7 +11,7 @@
 set -e
 
 apk add --no-cache python3 py3-pip borgbackup postgresql-client mariadb-client mongodb-tools \
-    py3-ruamel.yaml py3-ruamel.yaml.clib
+    py3-ruamel.yaml py3-ruamel.yaml.clib bash
 # If certain dependencies of black are available in this version of Alpine, install them.
 apk add --no-cache py3-typed-ast py3-regex || true
 python3 -m pip install --no-cache --upgrade pip==22.0.3 setuptools==60.8.1

tests/end-to-end/test_completion.py

@@ -2,4 +2,4 @@ import subprocess
 
 
 def test_bash_completion_runs_without_error():
-    subprocess.check_call('eval "$(borgmatic --bash-completion)"', shell=True)
+    subprocess.check_call('borgmatic --bash-completion | bash', shell=True)