(Debugger Operation): Add index entries for fringe usage.

diff --git a/man/building.texi b/man/building.texi
index 797ac2daa819332d23e4428866612c654cf3138e..3ec41de772f474784beecb6c7d1a8da7b5c9fbd3 100644 (file)
--- a/man/building.texi
+++ b/man/building.texi
@@ -345,13 +345,14 @@ allowed.  GUD assumes that the first argument not starting with a
 @node Debugger Operation
 @subsection Debugger Operation
 
+@cindex fringes, and current execution line in GUD
   When you run a debugger with GUD, the debugger uses an Emacs buffer
 for its ordinary input and output.  This is called the GUD buffer.  The
 debugger displays the source files of the program by visiting them in
 Emacs buffers.  An arrow (@samp{=>}) in one of these buffers indicates
 the current execution line.@footnote{Under a window system the arrow is
-displayed in the marginal area of the Emacs window.}  Moving point in
-this buffer does not move the arrow.
+displayed in the marginal area of the Emacs window, called @dfn{the
+fringe}.}  Moving point in this buffer does not move the arrow.
 
   You can start editing these source files at any time in the buffers
 that display them.  The arrow is not part of the file's