treewide: Fix all Nix ASTs in all markdown files

This allows for correct highlighting and maybe future automatic
formatting. The AST was verified to work with nixfmt only.

1 files changed, 13 insertions, 7 deletions

diff --git a/nixos/doc/manual/configuration/ipv4-config.section.md b/nixos/doc/manual/configuration/ipv4-config.section.md
index c73024b856d73..0464f53898554 100644
--- a/nixos/doc/manual/configuration/ipv4-config.section.md
+++ b/nixos/doc/manual/configuration/ipv4-config.section.md
@@ -5,18 +5,22 @@ configure network interfaces. However, you can configure an interface
 manually as follows:
 
 ```nix
-networking.interfaces.eth0.ipv4.addresses = [ {
-  address = "192.168.1.2";
-  prefixLength = 24;
-} ];
+{
+  networking.interfaces.eth0.ipv4.addresses = [ {
+    address = "192.168.1.2";
+    prefixLength = 24;
+  } ];
+}
 ```
 
 Typically you'll also want to set a default gateway and set of name
 servers:
 
 ```nix
-networking.defaultGateway = "192.168.1.1";
-networking.nameservers = [ "8.8.8.8" ];
+{
+  networking.defaultGateway = "192.168.1.1";
+  networking.nameservers = [ "8.8.8.8" ];
+}
 ```
 
 ::: {.note}
@@ -28,7 +32,9 @@ configuration is performed by `network-setup.service`.
 The host name is set using [](#opt-networking.hostName):
 
 ```nix
-networking.hostName = "cartman";
+{
+  networking.hostName = "cartman";
+}
 ```
 
 The default host name is `nixos`. Set it to the empty string (`""`) to