Add version of the command that completes

This is related to bazelbuild/bazel#18686

.bazelrc

@@ -1,4 +1,6 @@
 # !!!! Note that the readme's command disables this file, only modify it if you have it re-enabled!!!!
 
+build --disk_cache=~/.cache/bazel_repro_cache
+
 build --experimental_remote_merkle_tree_cache
-# build --experimental_remote_merkle_tree_cache_size=0 # This doesn't seem to fix it
+build --experimental_remote_merkle_tree_cache_size=0 # 0=Unlimited. Without this: the build seemingly never completes. With it: it takes over a minute.

README.md

@@ -3,7 +3,9 @@
 ```
 bazel --version
 ./write.sh a
-bazel --ignore_all_rc_files build --experimental_remote_merkle_tree_cache --disk_cache=~/.cache/bazel_repro_cache //:big
+bazel --ignore_all_rc_files build --experimental_remote_merkle_tree_cache --experimental_remote_merkle_tree_cache_size=0 --disk_cache=~/.cache/bazel_repro_cache //:big
 ```
 
+The command takes approximately 2 minutes to complete on `bazelbuild/7.0.0`, and only a couple of seconds on `bazelbuild/6.4.0`
+
 Re-run `./write.sh` with a new string argument to bust the cache, if desired.