feat: Rename variable local_target to __main_target

src/lib/source.sh

@@ -37,7 +37,7 @@ validate_sources() {
 }
 
 validate_targets() {
-    # Check targets array and set local_target variable.
+    # Check targets array and set __main_target variable.
     #
     # Usage: validate_targets ARRAY
 
@@ -65,9 +65,9 @@ validate_targets() {
             "You must provide one or more targets with 'file' scheme." >&2
         exit 1
     else
-        # Set local_target. This variable contains path to save local backups.
+        # Set __main_target. This variable contains path to save local backups.
         # Files to additional targets will be coped from this directory.
-        local_target="${file_targets[0]}"
+        __main_target="${file_targets[0]}"
     fi
 }