Fix identation

tools/src/main/java/org/thingsboard/client/tools/i18n/TranslationPruner.java

@@ -1,5 +1,8 @@
 package org.thingsboard.client.tools.i18n;
 
+import com.fasterxml.jackson.core.util.DefaultPrettyPrinter;
+import com.fasterxml.jackson.core.util.Separators;
+import com.fasterxml.jackson.core.util.Separators.Spacing;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.node.ObjectNode;
@@ -73,8 +76,9 @@ public class TranslationPruner {
                     throw new IllegalArgumentException("Source JSON must be an object at root");
                 }
                 ObjectNode pruned = pruneNode((ObjectNode) sourceRoot, validKeys, "", mapper);
-
-                mapper.writerWithDefaultPrettyPrinter().writeValue(destFile, pruned);
+                Separators seps = Separators.createDefaultInstance()
+                        .withObjectFieldValueSpacing(Spacing.AFTER);
+                mapper.writer(new DefaultPrettyPrinter().withSeparators(seps)).writeValue(destFile, pruned);
                 System.out.println("Pruned translation written to " + destFile.getPath());
             }
         } catch (IOException e) {