tests/FILEFORMAT: mention how to use <fileN> and <stripfileN> too
[ci skip]
diff --git a/tests/FILEFORMAT b/tests/FILEFORMAT
index ffc77a2..68a7854 100644
--- a/tests/FILEFORMAT
+++ b/tests/FILEFORMAT
@@ -445,11 +445,30 @@
have a text/binary difference.
Variables are substituted as in the <command> section.
</file>
+<file1>
+1 to 4 can be appended to 'file' to compare more files.
+</file1>
+<file2>
+</file2>
+<file3>
+</file3>
+<file4>
+</file4>
<stripfile>
One perl op per line that operates on the output file or stdout before being
compared with what is stored in the test file. This is pretty
advanced. Example: "s/^EPRT .*/EPRT stripped/"
</stripfile>
+<stripfile1>
+1 to 4 can be appended to 'stripfile' to strip the correspending <fileN>
+content
+</stripfile1>
+<stripfile2>
+</stripfile2>
+<stripfile3>
+</stripfile3>
+<stripfile4>
+</stripfile4>
<upload>
the contents of the upload data curl should have sent
</upload>
