replace tab with spaces in swift 5 codegen

Author: wing328

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/Swift5ClientCodegen.java

@@ -517,7 +517,7 @@ public String apiFileFolder() {
 
     @Override
     public String getTypeDeclaration(Schema p) {
-    	if (ModelUtils.isArraySchema(p)) {
+        if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;
             Schema inner = ap.getItems();
             return ModelUtils.isSet(p) ? "Set<" + getTypeDeclaration(inner) + ">" : "[" + getTypeDeclaration(inner) + "]";
@@ -634,7 +634,7 @@ public String toDefaultValue(Schema p) {
 
     @Override
     public String toInstantiationType(Schema p) {
-    	if (ModelUtils.isMapSchema(p)) {
+        if (ModelUtils.isMapSchema(p)) {
             return getSchemaType(getAdditionalProperties(p));
         } else if (ModelUtils.isArraySchema(p)) {
             ArraySchema ap = (ArraySchema) p;