[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_nacm_module_write.sh

@@ -61,10 +61,10 @@ module nacm-example{
   namespace "urn:example:nacm";
   prefix nex;
   import clixon-example {
-	prefix ex;
+        prefix ex;
   }
   import ietf-netconf-acm {
-	prefix nacm;
+        prefix nacm;
   }
   leaf x{
     type int32;
@@ -90,14 +90,14 @@ module clixon-example{
   namespace "urn:example:clixon";
   prefix ex;
     container table{
-	list parameter{
-	    key name;
-	    leaf name{
-		type string;
-	    }
-	    leaf value{
-		type string;
-	    }
+        list parameter{
+            key name;
+            leaf name{
+                type string;
+            }
+            leaf value{
+                type string;
+            }
      }
    }
     /* State data (not config) for the example application*/
@@ -169,7 +169,7 @@ 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
@@ -293,7 +293,7 @@ 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