Vars: interface improve docs formatting

nixosModules/clanCore/vars/interface.nix

@@ -60,7 +60,10 @@ in
               description = ''
                 A list of other generators that this generator depends on.
                 The output values of these generators will be available to the generator script as files.
-                For example, the file 'file1' of a dependency named 'dep1' will be available via $in/dep1/file1.
+
+                For example:
+
+                **A file `file1` of a generator named `dep1` will be available via `$in/dep1/file1`**
               '';
               type = listOf str;
               default = [ ];
@@ -321,9 +324,11 @@ in
               description = ''
                 The script to run to generate the files.
                 The script will be run with the following environment variables:
-                  - $in: The directory containing the output values of all declared dependencies
-                  - $out: The output directory to put the generated files
-                  - $prompts: The directory containing the prompted values as files
+
+                - $in: The directory containing the output values of all declared dependencies
+                - $out: The output directory to put the generated files
+                - $prompts: The directory containing the prompted values as files
+
                 The script should produce the files specified in the 'files' attribute under $out.
               '';
               type = either str path;

nixosModules/clanCore/zerotier/generate.py

@@ -55,9 +55,9 @@ class Identity:
 
     def node_id(self) -> str:
         nid = self.public.split(":")[0]
-        assert (
-            len(nid) == 10
-        ), f"node_id must be 10 characters long, got {len(nid)}: {nid}"
+        assert len(nid) == 10, (
+            f"node_id must be 10 characters long, got {len(nid)}: {nid}"
+        )
         return nid
 
 
@@ -172,9 +172,9 @@ def create_identity() -> Identity:
 
 
 def compute_zerotier_ip(network_id: str, identity: Identity) -> ipaddress.IPv6Address:
-    assert (
-        len(network_id) == 16
-    ), f"network_id must be 16 characters long, got '{network_id}'"
+    assert len(network_id) == 16, (
+        f"network_id must be 16 characters long, got '{network_id}'"
+    )
     nwid = int(network_id, 16)
     node_id = int(identity.node_id(), 16)
     addr_parts = bytearray(