diff --git a/.git-blame-ignore-revs b/.git-blame-ignore-revs
new file mode 100644
index 000000000..eac3ae6cd
--- /dev/null
+++ b/.git-blame-ignore-revs
@@ -0,0 +1,3 @@
+
+# Mechanical runtime formatting; executable syntax is unchanged.
+2aca7aecbb38c8554d40ddbc415fec37b3a65ec4