fix typo

Author: Jia Liu

src/main/resources/genius/en/code/test-gen.vm

@@ -21,8 +21,8 @@ ${context.sourceCode}
 
 ## if newFile
 #if( $context.isNewFile )
-Should include package an imports. Start method test code with Markdown code block here:
+Should include package and imports. Start method test code with Markdown code block here:
 #else
-Should include package an imports. Start ${context.testClassName} test code with Markdown code block here:
+Should include package and imports. Start ${context.testClassName} test code with Markdown code block here:
 #end