Update copyright info for test files

[ci skip]

tests/resources/README.rst

@@ -88,14 +88,18 @@ under the terms of the license in LICENSE.rst.
     *   - overlay.pdf
         - @maxandersen
         - PDF file generated by PDFPen pro that triggered content stream parse errors
-    *   - no_conentes.pdf
+    *   - no_contents.pdf
         - @jbarlow83
         - synthetic PDF with a blank page that has no /Contents entry
+    *   - crom.png
+        - @jbarlow83
+        - test for non-dictionary words
+
 
 Assemblies
 ==========
 
-These test resources are assemblies from other previously mentioned files, released under the same license terms as their input files.
+These test resources are assemblies or derivatives from other previously mentioned files, released under the same license terms as their input files.
 
 - cardinal.pdf (four cardinal directions, baked-in rotated copies of LinnSequencer.jpg)
 - ccitt.pdf (LinnSequencer.jpg, converted to CCITT encoding)
@@ -107,6 +111,9 @@ These test resources are assemblies from other previously mentioned files, relea
 - rotated_skew.pdf (a /Rotate'd and skewed document from LinnSequencer.jpg)
 - skew.pdf (from LinnSequencer.jpg, skew simulated by adjusting the transformation matrix)
 - skew-encrypted.pdf (skew.pdf with encryption - access supported by PyPDF2)
+- baiona_gray.png (from baiona.png)
+- poster.pdf (from LinnSequencer.jpg)
+
 
 
 .. _`Wikimedia: LinnSequencer`: https://upload.wikimedia.org/wikipedia/en/b/b7/LinnSequencer_hardware_MIDI_sequencer_brochure_page_2_300dpi.jpg