Fix a couple of typos

doc/tutorial/02-db.md

@@ -42,7 +42,7 @@ version string.
 The string after `(defn db ...` is a *docstring*, documenting the function's
 behavior. When given a `version`, the `db` function uses `reify` to construct a
 new object satisfying jepsen's `DB` protocol (from the `db` namespace). That
-protocol specifies two functions all databases must support: `(setup db test
+protocol specifies two functions all databases must support: `(setup! db test
 node)`, and `(teardown! db test node)`. We provide stub implementations
 here, which simply log an informational message.
 
@@ -64,7 +64,7 @@ construct using the `db` function we just wrote. We'll test etcd version
 ```
 
 `noop-test`, like all Jepsen tests, is a map with keys like `:os`, `:name`,
-`:db`, etc. See [jepsen.core](../../master/jepsen/src/jepsen/core.clj) for an
+`:db`, etc. See [jepsen.core](../../jepsen/src/jepsen/core.clj) for an
 overview of test structure, and `jepsen.core/run` for the full definition of a
 test.