Added a test that appends special chars
Added a test that appends special chars

hemantsangwan/Arduino-Json,tirumalavan/ArduinoJson,venkatarajasekhar/ArduinoJson,lono-devices/ArduinoJson,hassanabidpk/ArduinoJson,alyf80/ArduinoJson,peterpolidoro/ArduinoJson,firepick1/ArduinoJson,janelia-arduino/ArduinoJson,ELZo3/ArduinoJson,peterpolidoro/ArduinoJson,AndreyAyres/ArduinoJson,naveensuryakumar/json,naveensuryakumar/json,fayvlad/ArduinoJson,tirumalavan/ArduinoJson,hassanabidpk/ArduinoJson,firepick1/ArduinoJson,naveensuryakumar/json,AndreyAyres/ArduinoJson,ELZo3/ArduinoJson,chuz/ArduinoJson,bblanchon/ArduinoJson,venkatarajasekhar/ArduinoJson,venusdharan/ArduinoJson,venusdharan/ArduinoJson,bblanchon/ArduinoJson,weera00/ArduinoJson,hemantsangwan/Arduino-Json,alyf80/ArduinoJson,venusdharan/ArduinoJson,spotman/ArduinoJson,hemantsangwan/Arduino-Json,CanTireInnovations/ArduinoJson,0ddie/ArduinoJson,tirumalavan/ArduinoJson,chuz/ArduinoJson,weera00/ArduinoJson,spotman/ArduinoJson,PeeJay/ArduinoJson,alyf80/ArduinoJson,lono-devices/ArduinoJson,venkatarajasekhar/ArduinoJson,peterpolidoro/ArduinoJson,0ddie/ArduinoJson,CanTireInnovations/ArduinoJson,PeeJay/ArduinoJson,chuz/ArduinoJson,janelia-arduino/ArduinoJson,ELZo3/ArduinoJson,fayvlad/ArduinoJson,weera00/ArduinoJson,spotman/ArduinoJson,janelia-arduino/ArduinoJson,CanTireInnovations/ArduinoJson,firepick1/ArduinoJson,bblanchon/ArduinoJson,PeeJay/ArduinoJson,janelia-arduino/ArduinoJson,fayvlad/ArduinoJson,lono-devices/ArduinoJson,AndreyAyres/ArduinoJson,peterpolidoro/ArduinoJson,hassanabidpk/ArduinoJson