stlab · dabrahams · Sep 17, 2025 · Sep 23, 2025 · Sep 30, 2025 · Sep 30, 2025
diff --git a/better-code/src/SUMMARY.md b/better-code/src/SUMMARY.md
@@ -2,3 +2,4 @@
 
 - [Introduction](./chapter-1-introduction.md)
 - [Contracts](./chapter-2-contracts.md)
+- [Errors](./chapter-3-errors.md)
diff --git a/better-code/src/chapter-2-contracts.md b/better-code/src/chapter-2-contracts.md
@@ -639,6 +639,7 @@ It's an invariant of your program that a manager ID can't just be
 random; it has to identify an employee that's in the database—that's
 part of what it means for the program to be in a good state, and all
 through the program you have code to ensure that invariant is upheld.
+
 #### Encapsulating invariants
 
 It would be a good idea to identify and document that whole-program
Original file line number	Diff line number	Diff line change
Expand Up		@@ -2,3 +2,4 @@

		- [Introduction](./chapter-1-introduction.md)
		- [Contracts](./chapter-2-contracts.md)
		- [Errors](./chapter-3-errors.md)