[FIX,FEATURE] Fixing assign() for const-holder.
[FIX,FEATURE] Fixing assign() for const-holder.

bayolau/seqan,xenigmax/seqan,budach/seqan,bestrauc/seqan,hannespetur/SeqAnHTS,budach/seqan,limeng12/seqan,JohnReid/seqan,xp3i4/seqan,ktrappe/seqan,xp3i4/seqan,hannespetur/SeqAnHTS,PF2-pasteur-fr/seqan,budach/seqan,h-2/seqan,catkira/seqan,hannespetur/SeqAnHTS,PF2-pasteur-fr/seqan,JohnReid/seqan,limeng12/seqan,catkira/seqan,h-2/seqan,limeng12/seqan,bayolau/seqan,JohnReid/seqan,h-2/seqan,xp3i4/seqan,catkira/seqan,PF2-pasteur-fr/seqan,limeng12/seqan,budach/seqan,limeng12/seqan,xp3i4/seqan,h-2/seqan,bestrauc/seqan,hannespetur/SeqAnHTS,JohnReid/seqan,hannespetur/SeqAnHTS,bayolau/seqan,ktrappe/seqan,catkira/seqan,h-2/seqan,limeng12/seqan,ktrappe/seqan,hannespetur/SeqAnHTS,catkira/seqan,bayolau/seqan,hannespetur/SeqAnHTS,bestrauc/seqan,xenigmax/seqan,bestrauc/seqan,catkira/seqan,bayolau/seqan,ktrappe/seqan,xenigmax/seqan,JohnReid/seqan,bayolau/seqan,JohnReid/seqan,bestrauc/seqan,xp3i4/seqan,JohnReid/seqan,bayolau/seqan,budach/seqan,bayolau/seqan,xenigmax/seqan,h-2/seqan,catkira/seqan,bestrauc/seqan,h-2/seqan,ktrappe/seqan,JohnReid/seqan,bestrauc/seqan,bayolau/seqan,xp3i4/seqan,limeng12/seqan,ktrappe/seqan,limeng12/seqan,xenigmax/seqan,limeng12/seqan,h-2/seqan,PF2-pasteur-fr/seqan,xp3i4/seqan,xenigmax/seqan,budach/seqan,catkira/seqan,hannespetur/SeqAnHTS,budach/seqan,PF2-pasteur-fr/seqan,PF2-pasteur-fr/seqan,hannespetur/SeqAnHTS,ktrappe/seqan,PF2-pasteur-fr/seqan,bestrauc/seqan,budach/seqan,ktrappe/seqan,PF2-pasteur-fr/seqan,xenigmax/seqan,xp3i4/seqan,JohnReid/seqan,xp3i4/seqan,h-2/seqan,ktrappe/seqan,xenigmax/seqan,budach/seqan,PF2-pasteur-fr/seqan,catkira/seqan