Update a journey test tree use delcaration to find

This also stops installing `tree` on CI.

The `tree` package provides the `tree` command, which is useful but
does not currently appear to be used anywhere. At one time, various
journey tests had used it to generate output for comparison, and
this usage/dependency was declared with `with_program` in 688280b,
which was also when the first command to install it was added to
CI.

Later, `tree` was found to be unportable or otherwise unsuitable in
the counts it output, and all uses of it were replaced with `find`
in 3c1bfd5 (#861). At that point, most `with_program` declarations
for it were changed to `find`, but one of them in the `ein` journey
tests was not replaced at that time.

That test does use `find` (and not `tree`), and should declare its
use of `find` rather than `tree`. This commit makes that change.
One benefit of doing so is that it is possible to run the tests on
a CI (or other) system without `tree` without skipping any tests,
so this also removes it from the lists of packages to install with
`apt-get` and `brew` in CI jobs.

Author: EliahKagan

.github/workflows/ci.yml

@@ -65,7 +65,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@v2
       - name: Setup dependencies
-        run: sudo apt-get install -y --no-install-recommends liblzma-dev tree
+        run: sudo apt-get install -y --no-install-recommends liblzma-dev
       - uses: extractions/setup-just@v2
       - uses: taiki-e/install-action@v2
         with:
@@ -91,8 +91,8 @@ jobs:
       - uses: Swatinem/rust-cache@v2
       - name: Setup dependencies (macos)
         if: startsWith(matrix.os, 'macos')
-        run: brew install tree openssl gnu-sed
-      - name: "cargo check default features"
+        run: brew install openssl gnu-sed
+      - name: cargo check default features
         if: startsWith(matrix.os, 'windows')
         run: cargo check --workspace --bins --examples
       - uses: taiki-e/install-action@v2

tests/journey/ein.sh

@@ -28,7 +28,7 @@ title "Porcelain ${kind}"
     )
   )
   snapshot="$snapshot/porcelain"
-  (with_program tree
+  (with_program find
     (when "using the 'tool' subcommand"
       title "ein tool"
       (with "a repo with a tiny commit history"