--- doc/groff.texinfo.orig	2014-08-30 02:39:34.000000000 +0900
+++ doc/groff.texinfo	2014-08-30 02:40:07.000000000 +0900
@@ -10204,7 +10204,7 @@
 affected glyphs.
 @endDefesc
 
-@Defesc {\\z, , g, , }
+@Defesc {\\z, , g, }
 @cindex zero-width printing (@code{\z}, @code{\Z})
 @cindex printing, zero-width (@code{\z}, @code{\Z})
 Print glyph @var{g} with zero width, i.e., without spacing.  Use