tasks: wrap add-header-in-src-files sub-task in function
tasks: wrap add-header-in-src-files sub-task in function

plotly/plotly.js,aburato/plotly.js,etpinard/plotly.js,plotly/plotly.js,plotly/plotly.js,etpinard/plotly.js,etpinard/plotly.js,plotly/plotly.js,iongroup/plotly.js,iongroup/plotly.js,iongroup/plotly.js,aburato/plotly.js,asolagmbh/plotly.js,asolagmbh/plotly.js,asolagmbh/plotly.js