maint: fix HACKING instructions to run a single test

* HACKING: s/make TEST=/make check TEST=/
The 'check' target was missing there since v8.20-57-geac397e.

diff --git a/HACKING b/HACKING
index 07d82253ad0d72a069ae57adb48cbf64874974ef..a42e102ea5f7ad786bd44ba72f25c1849b0d7758 100644 (file)
--- a/HACKING
+++ b/HACKING
@@ -444,7 +444,7 @@ as possible.  If you add a new test file (as opposed to adding a test to
 an existing test file) add the new test file to 'tests/local.mk'.
 Note to run tests/misc/new-test in isolation you can do:
 
-  make TESTS=tests/misc/new-test SUBDIRS=. VERBOSE=yes
+  make check TESTS=tests/misc/new-test SUBDIRS=. VERBOSE=yes
 
 Variables that are significant for tests with their default values are: