message: format: add newline before printing command to execute.
diff: @@ -126,7 +126,7 @@ def checkTools():
  error_messages.append(
  "Command {} not found. If you have buildifier installed, but the binary "
  "name is different or it's not available in $GOPATH/bin, please use "
  - "BUILDIFIER_BIN environment variable to specify the path. Example:"
  + "BUILDIFIER_BIN environment variable to specify the path. Example:\n"
  " export BUILDIFIER_BIN=/opt/bin/buildifier\n"
  "If you don't have buildifier installed, you can install it by:\n"
  " go get -u github.com/bazelbuild/buildtools/buildifier".format(BUILDIFIER_PATH))
  