ftwrite would need the bg argument even though a default value
was apparently provided. Now that default is actually being used.ggwrite gives a message instead of a warning when empty spaces are
being removed from file names.ftwrite argument takes a time argument like ggwrite. It did
already by passing it downstream but now it is explicit like for
ggwrite.Missing script argument supported in ftwrite.
ggwrite support multiple formats (new argument aligning with writeFlextab) and canvases. In this case, the canvas name will be appended to file names.
ftwrite now throws an error in case unsupported output formats are requested.
ftwrite support the 'save' argument like ggwrite.