Change heap init environment variable names

This commit changes RUBY_GC_HEAP_INIT_SIZE_{40,80,160,320,640}_SLOTS to
RUBY_GC_HEAP_{0,1,2,3,4}_INIT_SLOTS. This is easier to use because the
user does not need to determine the slot sizes (which can vary between
32 and 64 bit systems). They now just use the heap names
(`GC.stat_heap.keys`).

1 files changed, 1 insertions, 1 deletions

diff --git a/NEWS.md b/NEWS.md
index 6d439762ac..3764db7df1 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -13,7 +13,7 @@ Note that each entry is kept to a minimum, see links for details.
   They are not displayed by default even in verbose mode.
   Turn them on with `-W:performance` or `Warning[:performance] = true`. [[Feature #19538]]
 * The `RUBY_GC_HEAP_INIT_SLOTS` environment variable has been deprecated and
-  removed. Environment variables `RUBY_GC_HEAP_INIT_SIZE_%d_SLOTS` should be
+  removed. Environment variables `RUBY_GC_HEAP_%d_INIT_SLOTS` should be
   used instead.  [[Feature #19785]]
 
 ## Core classes updates