Apparently, ImageMagick, realized, that their earlier rip-off "release"
(1.2.0.11) of GraphicsMagick's tar-ball (1.2.0.10) had "GraphicsMagick"
in several $Header$ fields.
So they cut another "release", which brings a slightly updated
libtool/autoconf soup, and GraphicsMagick duly replaced by ImageMagick
in all of those pesky $Header$ lines.
There are no functional differences WHATSOEVER in the source files, but
the earlier 1.2.0.11 is no longer available.
Notified by: all recent builders of ImageMagick