patch 8.1.1539: not easy to define a variable and lock it
Problem: Not easy to define a variable and lock it.
Solution: Add ":const".
diff --git a/src/testdir/Make_all.mak b/src/testdir/Make_all.mak
index 08f6c5b..9e551c1 100644
--- a/src/testdir/Make_all.mak
+++ b/src/testdir/Make_all.mak
@@ -87,6 +87,7 @@
test_comparators \
test_compiler \
test_conceal \
+ test_const \
test_crypt \
test_cscope \
test_cursor_func \
@@ -312,6 +313,7 @@
test_command_count.res \
test_comparators.res \
test_conceal.res \
+ test_const.res \
test_crypt.res \
test_cscope.res \
test_curswant.res \