[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_identity.sh

@@ -134,7 +134,7 @@ module example-my-crypto {
                 type string;
              }
              leaf type {
-	        type acl-type;
+                type acl-type;
              }
           } 
        }
@@ -191,7 +191,7 @@ if [ $BE -ne 0 ]; then
     new "kill old backend"
     sudo clixon_backend -zf $cfg
     if [ $? -ne 0 ]; then
-	err
+        err
     fi
     new "start backend -s init -f $cfg"
     start_backend -s init -f $cfg
@@ -395,7 +395,7 @@ 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