Make imported subdirectory example consistent

Author: crd

book/07-git-tools/sections/rewriting-history.asc

@@ -292,7 +292,7 @@ To run `filter-branch` on all your branches, you can pass `--all` to the command
 
 ===== Making a Subdirectory the New Root
 
-Suppose you’ve done an import from another source control system and have subdirectories that make no sense (trunk, tags, and so on).
+Suppose you’ve done an import from another source control system and have subdirectories that make no sense (`trunk`, `tags`, and so on).
 If you want to make the `trunk` subdirectory be the new project root for every commit, `filter-branch` can help you do that, too:
 
 [source,console]