add humor appendix; closes #163

Author: mark-i-m

src/SUMMARY.md

@@ -99,6 +99,11 @@
 [Appendix C: Glossary](./appendix/glossary.md)
 [Appendix D: Code Index](./appendix/code-index.md)
 [Appendix E: Bibliography](./appendix/bibliography.md)
+
+[Appendix Z HumorRust](./appendix/humorust.md)
+
+---
+
 [](./important-links.md)
 
 [pau]: ./borrow_check/region_inference/placeholders_and_universes.md

src/appendix/humorust.md

@@ -0,0 +1,10 @@
+# Humor in Rust
+
+What's a project without a sense of humor? And frankly some of these are
+enlightening?
+
+- [Weird exprs test](https://github.com/rust-lang/rust/blob/master/src/test/run-pass/weird-exprs.rs)
+- [Ferris Rap](http://fitzgeraldnick.com/2018/12/13/rust-raps.html)
+- [The Genesis of Generic Germination](https://github.com/rust-lang/rust/pull/53645#issue-210543221)
+- [The Bastion of the Turbofish test](https://github.com/rust-lang/rust/blob/79d8a0fcefa5134db2a94739b1d18daa01fc6e9f/src/test/ui/bastion-of-the-turbofish.rs)
+- [Rust Koans](https://users.rust-lang.org/t/rust-koans/2408/4)