Use of the undocumented KEYWORD4 has the unexpected result of coloring the keyword as an inline comment in Arduino IDE 1.6.4 and older. Use of the undocumented KEYWORD5 has the unexpected result of coloring the keyword as a hyperlink in Arduino IDE 1.6.4 and older.
Use of the undocumented KEYWORD4 has the unexpected result of coloring the keyword as an inline comment in Arduino IDE 1.6.4 and older. Use of the undocumented KEYWORD5 has the unexpected result of coloring the keyword as a hyperlink in Arduino IDE 1.6.4 and older.
Reference: https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#keyword_tokentype