Fix handling of insertAt option to addLineWidget
Fix handling of insertAt option to addLineWidget

Issue #6460

wingify/CodeMirror,hackmdio/CodeMirror,hackmdio/CodeMirror,pabloferz/CodeMirror,nightwing/CodeMirror,hackmdio/CodeMirror,dperetti/CodeMirror,nightwing/CodeMirror,nightwing/CodeMirror,pabloferz/CodeMirror,wingify/CodeMirror,pabloferz/CodeMirror,dperetti/CodeMirror,dperetti/CodeMirror,wingify/CodeMirror