mercurial/configitems.py

--- a/mercurial/configitems.py	Wed Oct 18 12:53:00 2017 +0200
+++ b/mercurial/configitems.py	Wed Oct 18 09:07:48 2017 +0200
@@ -444,7 +444,7 @@
 coreconfigitem('experimental', 'sparse-read.density-threshold',
     default=0.25,
 )
-coreconfigitem('experimental', 'sparse-read.min-block-size',
+coreconfigitem('experimental', 'sparse-read.min-gap-size',
     default='256K',
 )
 coreconfigitem('experimental', 'treemanifest',