various fixes to #9, #10, and #14

labs/ext2/index.md

@@ -79,7 +79,7 @@ instructions:
   $ git pull upstream main
   ```
 At this stage, you should have the latest copy of the code, and you are good to
-get started. The starter code is contained under the `threads_basics/` directory.
+get started. The starter code is contained under the `ext2/` directory.
 
 If you are currently on a different branch (say you are still on
 `clab_solution` from a previous lab), then we need to switch to `main` or

labs/heapmm/index.md

@@ -192,10 +192,10 @@ struct __attribute__((aligned(8))) metadata {
   struct metadata *prev; /* The prev pointer in the linked list. */
 };
 ```
-and then we define a new type based on this union to make it easier to code
+and then we define a new type based on this structure to make it easier to code
 using:
 ```c
-typedef union metadata metadata_t;
+typedef struct metadata metadata_t;
 ```
 
 The members of `struct metadata` are explained in the comments above. The

labs/lab00/index.md

@@ -79,7 +79,7 @@ you are working on the right stuff.
 
 If you have not done so yet, please make sure that you have set up your class
 labs repository by following the [appropriate
-instructions.]({{site.baseurl}}{{site.resourcespath}}/setup)
+instructions.]({{site.baseurl}}/labs/wsl)
 
 Now that you are in the right repository, first make sure you are on the `main`
 branch: