Clarify line number instructions
Clarify line number instructions

Signed-off-by: J. Ryan Stinnett <91e4c98f79b38ce04c052c188926e2d9ae2a3b28@gmail.com>

vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,vector-im/vector-web,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web,vector-im/vector-web,vector-im/riot-web,vector-im/riot-web