Doc: Extending: fix typo

diff --git a/Documentation/extending/programming-interface.itely b/Documentation/extending/programming-interface.itely
index 4d7978cd53ec10a8f83a3ae2e864d3cf87977af8..7d2949ff11c256c795ac45dc97a3f3328f8f5b18 100644 (file)
--- a/Documentation/extending/programming-interface.itely
+++ b/Documentation/extending/programming-interface.itely
@@ -923,7 +923,7 @@ to @var{proc}, the outer ensures that result of the function is
 returned, rather than the @code{simple-closure} object.
 
 From within a callback, the easiest method for evaluating a markup is
-to use gro-interpret-markup.  For example:
+to use grob-interpret-markup.  For example:
 
 @example
 my-callback = #(lambda (grob)