fix: code block's style

docs/nixpkgs/overlays.md

@@ -16,7 +16,8 @@ Let's take a look at an example module that loads overlays. This module can be u
 
 {
   nixpkgs.overlays = [
-    # Overlay 1: Use `self` and `super` to express the inheritance relationship
+    # Overlay 1: Use `self` and `super` to express
+    # the inheritance relationship
     (self: super: {
       google-chrome = super.google-chrome.override {
         commandLineArgs =
@@ -24,7 +25,8 @@ Let's take a look at an example module that loads overlays. This module can be u
       };
     })
 
-    # Overlay 2: Use `final` and `prev` to express the relationship between the new and the old
+    # Overlay 2: Use `final` and `prev` to express
+    # the relationship between the new and the old
     (final: prev: {
       steam = prev.steam.override {
         extraPkgs = pkgs: with pkgs; [
@@ -62,14 +64,19 @@ In the previous example, all overlays were written in a single Nix file, which c
 Start by creating an `overlays` folder in your Git repository to store all overlay configurations. Inside this folder, create a `default.nix` file with the following content:
 
 ```nix
-# import all nix files in the current folder, and execute them with args as parameters
-# The return value is a list of all execution results, which is the list of overlays
+# import all nix files in the current folder,
+# and execute them with args as parameters
+# The return value is a list of all execution results, 
+# which is the list of overlays
 
 args:
-# execute and import all overlay files in the current directory with the given args
+# execute and import all overlay files in the current
+# directory with the given args
 builtins.map
-  (f: (import (./. + "/${f}") args))  # execute and import the overlay file
-  (builtins.filter          # find all overlay files in the current directory
+  # execute and import the overlay file
+  (f: (import (./. + "/${f}") args))
+  # find all overlay files in the current directory
+  (builtins.filter
     (f: f != "default.nix")
     (builtins.attrNames (builtins.readDir ./.)))
 ```
@@ -82,8 +89,11 @@ Next, write your overlay configurations in the `overlays` folder. For example, y
 { pkgs, config, lib, ... }:
 
 (self: super: {
-  rime-data = ./rime-data-flypy;  # Customized rime-data package
-  fcitx5-rime = super.fcitx5-rime.override { rimeDataPkgs = [ ./rime-data-flypy ]; };
+  # Customized rime-data package
+  rime-data = ./rime-data-flypy;
+  fcitx5-rime = super.fcitx5-rime.override {
+    rimeDataPkgs = [ ./rime-data-flypy ];
+  };
 })
 ```
 

docs/nixpkgs/overriding.md

@@ -15,10 +15,9 @@ To find out which parameters of a specific package can be overridden, there are
 
 By using these methods, you can discover the input parameters of a package and determine which ones can be modified using `override`.
 
-For example, let's take a look at the source code of `pkgs.hello`:
+For example, let's take a look at the source code of [pkgs.hello](https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/misc/hello/default.nix):
 
 ```nix
-# https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/misc/hello/default.nix
 { callPackage
 , lib
 , stdenv

docs/zh/nixpkgs/overlays.md

@@ -53,7 +53,8 @@
     })
 
     # overlay3 - 也可以将 overlay 定义在其他文件中
-    # 这里 overlay3.nix 中的内容格式与上面的一致，都是 `final: prev: { xxx = prev.xxx.override { ... }; }`
+    # 这里 overlay3.nix 中的内容格式与上面的一致
+    # 都是 `final: prev: { xxx = prev.xxx.override { ... }; }`
     (import ./overlays/overlay3.nix)
   ];
 }
@@ -74,23 +75,29 @@ args:
   # import 当前文件夹下所有的 nix 文件，并以 args 为参数执行它们
   # 返回值是一个所有执行结果的列表，也就是 overlays 的列表
   builtins.map
-  (f: (import (./. + "/${f}") args))  # map 的第一个参数，是一个 import 并执行 nix 文件的函数
-  (builtins.filter          # map 的第二个参数，它返回一个当前文件夹下除 default.nix 外所有 nix 文件的列表
+  # map 的第一个参数，是一个 import 并执行 nix 文件的函数
+  (f: (import (./. + "/${f}") args))
+  # map 的第二个参数，它返回一个当前文件夹下除 default.nix 外所有 nix 文件的列表
+  (builtins.filter
     (f: f != "default.nix")
     (builtins.attrNames (builtins.readDir ./.)))
 ```
 
 后续所有 overlays 配置都添加到 `overlays` 文件夹中，一个示例配置 `overlays/fcitx5/default.nix` 内容如下：
 
+> 这里参考了 https://github.com/NixOS/nixpkgs/blob/e4246ae1e7f78b7087dce9c9da10d28d3725025f/pkgs/tools/inputmethods/fcitx5/fcitx5-rime.nix
+
 ```nix
 # 为了不使用默认的 rime-data，改用我自定义的小鹤音形数据，这里需要 override
-## 参考 https://github.com/NixOS/nixpkgs/blob/e4246ae1e7f78b7087dce9c9da10d28d3725025f/pkgs/tools/inputmethods/fcitx5/fcitx5-rime.nix
 {pkgs, config, lib, ...}:
 
 (self: super: {
-  # 小鹤音形配置，配置来自 flypy.com 官方网盘的鼠须管配置压缩包「小鹤音形“鼠须管”for macOS.zip」
+  # 小鹤音形配置，配置来自 flypy.com 官方网盘的
+  # 鼠须管配置压缩包「小鹤音形“鼠须管”for macOS.zip」
   rime-data = ./rime-data-flypy;
-  fcitx5-rime = super.fcitx5-rime.override { rimeDataPkgs = [ ./rime-data-flypy ]; };
+  fcitx5-rime = super.fcitx5-rime.override {
+    rimeDataPkgs = [ ./rime-data-flypy ];
+  };
 })
 ```
 

docs/zh/nixpkgs/overriding.md

@@ -38,10 +38,9 @@ stdenv.mkDerivation rec {
 ```
 
 除了覆写参数，还可以通过 `overrideAttrs` 来覆写使用 `stdenv.mkDerivation` 构建的 Derivation 的属性。
-以 `pkgs.hello` 为例，首先通过前述方法查看这个包的源码：
+以 [pkgs.hello](https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/misc/hello/default.nix) 为例，首先通过前述方法查看这个包的源码：
 
 ```nix
-# https://github.com/NixOS/nixpkgs/blob/nixos-unstable/pkgs/applications/misc/hello/default.nix
 { callPackage
 , lib
 , stdenv