fix presubmit and echo

Author: rickeylev

.bcr/gazelle/presubmit.yml

@@ -27,10 +27,14 @@ bcr_test_module:
       platform: ${{ platform }}
       bazel: ${{ bazel }}
       shell_commands:
+        # Add an empty line in case the bazelrc is missing a trailing newline
+        - "echo '' >> .bazelrc"
         - "echo 'common --override_module=rules_python=' >> .bazelrc"
         - "bazel run //:gazelle_python_manifest.update"
         - "bazel run //:gazelle -- update"
       batch_commands:
+        # Add an empty line in case the bazelrc is missing a trailing newline
+        - "echo '' >> .bazelrc"
         - "echo common --override_module=rules_python= >> .bazelrc"
         - "bazel run //:gazelle_python_manifest.update"
         - "bazel run //:gazelle -- update"

examples/bzlmod/.bazelrc

@@ -28,4 +28,3 @@ common:bazel7.x --incompatible_python_disallow_native_rules
 # See issue 3567. Disable implicit python zip creation.
 common --build_python_zip=false
 common --@rules_python//python/config_settings:build_python_zip=false
-

gazelle/.bazelrc

@@ -20,6 +20,3 @@ common:bazel7.x --incompatible_python_disallow_native_rules
 # See issue 3567. Disable implicit python zip creation.
 common --build_python_zip=false
 common --@rules_python//python/config_settings:build_python_zip=false
-
-# Empty newline
-

gazelle/examples/bzlmod_build_file_generation/.bazelrc

@@ -18,6 +18,3 @@ common --override_module=rules_python=../../../
 # See issue 3567. Disable implicit python zip creation.
 common --build_python_zip=false
 common --@rules_python//python/config_settings:build_python_zip=false
-
-# Empty newline
-