[Typescript] Add Error to the list of reserved words that must be escaped (#4203)

* Add Error to the list of reserved words that must be escaped for Class-generation

This fixes a part of #2456.

* add in special casing for the model names to not clobber existing language type names

* address formatting issues to be in line with language convention

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/AbstractTypeScriptClientCodegen.java

@@ -55,7 +55,8 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
                 "Array",
                 "Date",
                 "number",
-                "any"
+                "any",
+                "Error"
         ));
         instantiationTypes.put("array", "Array");
 
@@ -174,6 +175,11 @@ public abstract class AbstractTypeScriptClientCodegen extends DefaultCodegen imp
                 return modelName;
             }
 
+            if (languageSpecificPrimitives.contains(name)) {
+                String modelName = camelize("model_" + name);
+                LOGGER.warn(name + " (model name matches existing language type) cannot be used as a model name. Renamed to " + modelName);
+                return modelName;
+            }
             // camelize the model name
             // phone_number => PhoneNumber
             return camelize(name);