plot_clusters_content: Write the components belonging to each functional group
In functClust: Functional Clustering of Redundant Components of a System

Write the components belonging to each functional group, on several pages if need.

plot_clusters_content(affectElt,
                      opt.sort = TRUE,
                      sepChar  = ", ",
                      nbline   = 25)

`affectElt`	a vector of integers. The vector contains the labels of the different functional groups to which each component belongs. Each functional group is labelled as an integer.
`opt.sort`	a logical. If `opt.sort = TRUE`, the names of assemblages are sorted alphabetically inside each motif.
`sepChar`	a string. The string is a separator between each element of list of strings.
`nbline`	an integer, that corresponds to a number of lines to plot by page.