add missing biblio to test

Author: dragonstyle

tests/docs/books/visualization-curriculum/bibliography.bib

@@ -0,0 +1,19 @@
+@article{knuth84,
+  author = {Knuth, Donald E.},
+  title = {Literate Programming},
+  year = {1984},
+  issue_date = {May 1984},
+  publisher = {Oxford University Press, Inc.},
+  address = {USA},
+  volume = {27},
+  number = {2},
+  issn = {0010-4620},
+  url = {https://doi.org/10.1093/comjnl/27.2.97},
+  doi = {10.1093/comjnl/27.2.97},
+  journal = {Comput. J.},
+  month = may,
+  pages = {97–111},
+  numpages = {15}
+}
+
+