manual: Use @code{errno} instead of @var{errno} [BZ #24063]

@var is intended for placeholders (such as function parameters).
Actual variables need to use @code because @var causes upper-case
output, resulting in a different C identifier.

1 files changed, 1 insertions, 1 deletions

diff --git a/manual/search.texi b/manual/search.texi
index 57dad7a56d..1574c96562 100644
--- a/manual/search.texi
+++ b/manual/search.texi
@@ -449,7 +449,7 @@ entry in the table is not the return value of the function.  It is
 returned by storing it in a pointer variable pointed to by the
 @var{retval} parameter.  The return value of the function is an integer
 value indicating success if it is non-zero and failure if it is zero.
-In the latter case the global variable @var{errno} signals the reason for
+In the latter case the global variable @code{errno} signals the reason for
 the failure.
 
 @table @code