docs: improve installation command hinting

docs/LINUX-DIST.md

@@ -9,8 +9,8 @@
 > Minimum available release: Snapshot
 > (Added on 2024-05-15)
 
-```console
-# opkg install lpac
+```shell
+opkg install lpac
 ```
 
 see <https://github.com/openwrt/packages/blob/master/utils/lpac/Makefile>
@@ -20,8 +20,8 @@ see <https://github.com/openwrt/packages/blob/master/utils/lpac/Makefile>
 > Minimum available release: [v3.20.0](https://pkgs.alpinelinux.org/packages?name=lpac&branch=v3.20)
 > (Release date: 2024-05-22).
 
-```console
-# pkg install lpac
+```shell
+pkg install lpac
 ```
 
 see <https://github.com/alpinelinux/aports/blob/master/community/lpac/APKBUILD>
@@ -30,10 +30,10 @@ see <https://github.com/alpinelinux/aports/blob/master/community/lpac/APKBUILD>
 
 > Need to enable [archlinuxcn repo](https://github.com/archlinuxcn/repo#readme) first
 
-```console
-# pacman -S lpac
-# # or lpac-git
-# pacman -S lpac-git
+```shell
+pacman -S lpac
+# or
+pacman -S lpac-git
 ```
 
 see <https://github.com/archlinuxcn/repo/blob/master/archlinuxcn/lpac/PKGBUILD> \
@@ -43,8 +43,8 @@ see <https://github.com/archlinuxcn/repo/blob/master/archlinuxcn/lpac-git/PKGBUI
 
 > Need to enable [NUR](https://github.com/nix-community/NUR#readme "Nix User Repository") first
 
-```console
-# nix-env -i lpac
+```shell
+nix-env -i lpac
 ```
 
 see <https://github.com/nix-community/nur-combined/blob/master/repos/linyinfeng/pkgs/lpac/default.nix>