fix: linting bash files according to shfmt

Makefile

@@ -1,12 +1,12 @@
 .PHONY: lint_shellcheck
 lint_shellcheck:
-	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" -o -iname "*.tmux" \) | \
+	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" \) | \
 	xargs -I % sh -c 'shellcheck %'
 
 .PHONY: lint_shfmt
 lint_shfmt:
-	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" -o -iname "*.tmux" \) | \
-	xargs -I % sh -c 'shfmt -l -d %'
+	find . -type f -not -path "./uncommited/*" -a \( -iname "*.sh" \) | \
+	xargs -I % sh -c 'shfmt -i=2 -l -d -ln=bash %'
 
 .PHONY: check_scripts
 check_scripts: lint_shellcheck lint_shfmt