Some reference fonts: <img width="478" alt="screen shot 2017-10-22 at 13 33 38" src="https://user-images.githubusercontent.com/2049645/31866032-a82645a0-b72d-11e7-908f-1e8f417b0932.png"> Source Sans Pro: <img width="512" alt="screen shot 2017-10-22 at 13 33 45" src="https://user-images.githubusercontent.com/2049645/31866036-b2490306-b72d-11e7-82c3-13650a930c8e.png"> Wikipedia: https://en.wikipedia.org/wiki/Tie_(typography)#Undertie
Some reference fonts:
Source Sans Pro:
Wikipedia:
https://en.wikipedia.org/wiki/Tie_(typography)#Undertie