💅 add reference explaining git revisions

iterative · Jan 27, 2020 · 9171b9e · 9171b9e
1 parent 9d14acd
commit 9171b9e
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/tests/func/test_diff.py b/tests/func/test_diff.py
@@ -156,6 +156,10 @@ def test_directories(tmp_dir, scm, dvc):
     scm.add("dir.dvc")
     scm.commit("delete a file")
 
+
+    # The ":/<text>" format is a way to specify revisions by commit message:
+    #       https://git-scm.com/docs/git-rev-parse
+    #
     assert dvc.diff(":/init", ":/directory") == {
         "added": [
             {