See,

$ find . -name "*.sh" | xargs shellcheck -i SC2148

In ./replace.sh line 1:
^-- SC2148: Tips depend on target shell and yours is unknown. Add a shebang or a 'shell' directive.

For more information:
  https://www.shellcheck.net/wiki/SC2148 -- Tips depend on target shell and y...
Signed-off-by: Mario Trangoni <mjtrangoni@gmail.com>