manual: correct the spelling of "MALLOC_PERTURB_" [BZ #23015]

Reported-by: Martin Dorey <martin.dorey@hds.com>

diff --git a/manual/memory.texi b/manual/memory.texi
index e5ea71bc6d4275b94140577293b20fc1669f51a7..c132261084a24626f8b225307cabbb47a5b736ae 100644 (file)
--- a/manual/memory.texi
+++ b/manual/memory.texi
@@ -1142,7 +1142,7 @@ overwritten.
 The default value of this parameter is @code{0}.
 
 This parameter can also be set for the process at startup by setting the
-environment variable @env{MALLOC_MMAP_PERTURB_} to the desired value.
+environment variable @env{MALLOC_PERTURB_} to the desired value.
 
 @item M_TOP_PAD
 This parameter determines the amount of extra memory to obtain from the system