Improve argument validation in text_insert
Improve argument validation in text_insert

8l/vis,twinshadow/vis,trengrj/vis,trengrj/vis,clehner/vis,aoloe/vis,clehner/vis,twinshadow/vis,aoloe/vis,cpehle/vis,rychipman/vis,cpehle/vis,8l/vis,rychipman/vis