/master/example/DFRobot_PH_EC/DFRobot_PH_EC.ino Will not Compile

[jwilleke]

Header comments have wrong file mentioned.
`/*

• file DFRobot_PH_EC.ino
• @ https://github.com/DFRobot/DFRobot_EC

Fails to compile:
.../Arduino/libraries/DFRobot_PH-master/example/DFRobot_PH_EC/DFRobot_PH_EC.ino: In function 'void loop()':
.../Arduino/libraries/DFRobot_PH-master/example/DFRobot_PH_EC/DFRobot_PH_EC.ino:66:9: error: 'strupr' was not declared in this scope
strupr(cmd);
^~~~~~
.../Arduino/libraries/DFRobot_PH-master/example/DFRobot_PH_EC/DFRobot_PH_EC.ino:66:9: note: suggested alternative: 'strdup'
strupr(cmd);
^~~~~~
strdup

exit status 1

Compilation error: 'strupr' was not declared in this scope
`

This has been mentioned in the past.