test: Detect indention done using tab (\t) in *.sh

scripts/fix.sh

@@ -10,10 +10,18 @@ function mod_tidy_fix {
   run go mod tidy || return 2
 }
 
+function bash_ws_fix {
+  log_callout "Fixing whitespaces in the bash scripts"
+  # Makes sure all bash scripts do use '  ' (double space) for indention. 
+  log_cmd "% find ./ -name '*.sh' | xargs sed --follow-symlinks -i 's|\t|  |g'"
+  find ./ -print0 -name '*.sh' | xargs -0 sed --follow-symlinks -i 's|\t|  |g'
+}
+
 log_callout -e "\nFixing etcd code for you...\n"
 
 run_for_modules run go fmt || exit 2
 run_for_modules mod_tidy_fix || exit 2
 run_for_module tests bom_fix || exit 2
+bash_ws_fix || exit 2
 
 log_success -e "\nSUCCESS: etcd code is fixed :)"