fixup! scalar: document config settings

Inserts a missing "to" and replaces a tab in the middle with a space.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

Documentation/scalar.adoc

@@ -297,7 +297,7 @@ index.skipHash=true::
 
 index.threads=true::
 	This tells Git to automatically detect how many threads it should use
-	when reading the index due the default value of	`core.preloadIndex`,
+	when reading the index due to the default value of `core.preloadIndex`,
 	which enables parallel index reads.
 
 index.version=4::