patch 8.2.1439: tiny and small builds have no test coverage

Problem:    Tiny and small builds have no test coverage.
Solution:   Restore tests that do not depend on the +eval feature.
            (Ken Takata, closes #6696)
diff --git a/src/testdir/test22.in b/src/testdir/test22.in
new file mode 100644
index 0000000..0e0e605
--- /dev/null
+++ b/src/testdir/test22.in
@@ -0,0 +1,15 @@
+Tests for complicated + argument to :edit command
+
+STARTTEST
+:$-1w! Xfile1
+:$w! Xfile2
+:edit +1|s/|/PIPE/|w Xfile1| e Xfile2|1 | s/\//SLASH/|w
+:w! test.out
+:e Xfile1
+:w >> test.out
+:qa!
+ENDTEST
+
+The result should be in Xfile1: "fooPIPEbar", in Xfile2: "fooSLASHbar"
+foo|bar
+foo/bar