Replace a non-ascii char with the corresponding groff escape in fbdev.man

man/fbdev.man

@@ -60,4 +60,4 @@ Enable rotation of the display. The supported values are "CW" (clockwise,
 __xservername__(__appmansuffix__), __xconfigfile__(__filemansuffix__), xorgconfig(__appmansuffix__), Xserver(__appmansuffix__),
 X(__miscmansuffix__), fbdevhw(__drivermansuffix__)
 .SH AUTHORS
-Authors include: Gerd Knorr, Michel Dänzer, Geert Uytterhoeven
+Authors include: Gerd Knorr, Michel D\(:anzer, Geert Uytterhoeven