[PATCH 2/2] Add test from From_-line escaping.

@@ -0,0 +1,64 @@
+#!/bin/sh
+
+test_description='git am properly unescaping From_ lines'
+
+. ./test-lib.sh
+
+cat >msg <<EOF
+From_ lines
+
+This is a commit message that contains a From_ line, which is line
+that begins with the characters "From ". Get ready for it, now...
+From this time forward, we'll have no From_-line bugs.
+
+Additionally, we'll also test lines that are escaped versions of From_
+lines. These are lines that begin with one or more '>' characters that
+are then followed by the characters "From ". We want to ensure that
+none of these intentional '>' characters get swallowed. Let's try that
+with three variations, (with 1, 2, and 3 leading '>' characters):
+
+>From now on (with one leading '>')
+>>From there to here (with two leading '>' characters)
+>>>From Here to Eternity (with three leading '>' characters)
+
+EOF
+
+test_expect_success setup '
+	echo hello >file &&
+	git add file &&
+	test_tick &&
+	git commit -m first &&
+	git tag first &&
+	echo world >>file &&
+	git add file &&
+	test_tick &&
+	git commit -s -F msg &&
+	git tag second &&
+	git format-patch --stdout first | sed -e "1{p;d};s/^\(>*From \)/>\1/" > From_ &&
+	{
+		echo "X-Fake-Field: Line One" &&
+		echo "X-Fake-Field: Line Two" &&
+		echo "X-Fake-Field: Line Three" &&
+		git format-patch --stdout first | sed -e "1d"
+	} > From_.eml
+'
+
+test_expect_success 'am unescapes From_ lines from mbox' '
+	git checkout first &&
+	git am From_ &&
+	! test -d .git/rebase-apply &&
+	test -z "$(git diff second)" &&
+	test "$(git rev-parse second)" = "$(git rev-parse HEAD)" &&
+	test "$(git rev-parse second^)" = "$(git rev-parse HEAD^)"
+'
+
+test_expect_success 'am does not unescape From_ lines from email' '
+	git checkout first &&
+	git am From_.eml &&
+	! test -d .git/rebase-apply &&
+	test -z "$(git diff second)" &&
+	test "$(git rev-parse second)" = "$(git rev-parse HEAD)" &&
+	test "$(git rev-parse second^)" = "$(git rev-parse HEAD^)"
+'
+
+test_done