[Code formatting: Change indentation style to space](https://github.com/clicon/clixon/issues/379)

* Applies to all c/h/y/l/sh files and .editorconfig

test/test_autocli_sub.sh

@@ -56,10 +56,10 @@ module $APPNAME {
       }
       list index{
         key i;
-	leaf i{
-	  type string;
-	}
-	leaf iv{
+        leaf i{
+          type string;
+        }
+        leaf iv{
           type string;
         }
       }
@@ -118,7 +118,7 @@ if [ $BE -ne 0 ]; then
     new "kill old backend"
     sudo clixon_backend -z -f $cfg
     if [ $? -ne 0 ]; then
-	err
+        err
     fi
     new "start backend -s startup -f $cfg"
     start_backend -s startup -f $cfg
@@ -157,7 +157,7 @@ if [ $BE -ne 0 ]; then
     # Check if premature kill
     pid=$(pgrep -u root -f clixon_backend)
     if [ -z "$pid" ]; then
-	err "backend already dead"
+        err "backend already dead"
     fi
     # kill backend
     stop_backend -f $cfg