Merge branch 'jk/test-cleanup'

Test cleanup.

* jk/test-cleanup:
  t/lib-*.sh: drop executable bit
  t/lib-credential.sh: drop shebang line

diff --cc t/lib-credential.sh
index bb88cc01087ba153ff57e856764c59d39b0f320f,5ea8bc9f1dcfe644da4b9ce720f2a523ff172475..dea2cbef5172954666f9ee40142273252b6fe7a2
mode 100755,100644..100644
--- 1/t/lib-credential.sh
--- 2/t/lib-credential.sh
+++ b/t/lib-credential.sh

diff --cc t/lib-gpg.sh
index 9fc5241228e800bd237d48018989c6aed3ef942b,8d28652b729b46cb08de8ddd4347dddda9e246a7..9fc5241228e800bd237d48018989c6aed3ef942b
mode 100755,100644..100644
--- 1/t/lib-gpg.sh
--- 2/t/lib-gpg.sh
+++ b/t/lib-gpg.sh

diff --cc t/lib-submodule-update.sh
index 64fc6487dd97b2b81dfa4ee718912ee02a8cf496,1dd17fc03e1203ba54bcfc45746033271172ad9c..64fc6487dd97b2b81dfa4ee718912ee02a8cf496
mode 100755,100644..100644
--- 1/t/lib-submodule-update.sh
--- 2/t/lib-submodule-update.sh
+++ b/t/lib-submodule-update.sh