doc: Fix grammar on installing.md

Signed-off-by: HoJeong Go <seia@outlook.kr>

doc/installing.md

@@ -227,15 +227,15 @@ If `newuidmap/newgidmap` tools are present on your system and `/etc/subuid`, `et
 
 ### Other distros: AlpineLinux
 
-The overall procedure follows the Ubuntu's one.
-You can get development resources required to build Incus on your AlpineLinux via following command:
+The overall procedure follows the Ubuntu instruction above.
+You can get the development resources required to build Incus on your AlpineLinux via the following command:
 
 ```sh
 apk add acl-dev autoconf automake eudev-dev gettext-dev go intltool libcap-dev libtool libuv-dev linux-headers lz4-dev tcl-dev sqlite-dev lxc-dev make xz
 ```
 
 To take advantage of all the necessary features of Incus, you must install additional packages.
-You can reference the list of packages you need to use specific function from [LXD package definition in AlpineLinux aports repository](https://gitlab.alpinelinux.org/alpine/infra/aports/-/blob/master/community/lxd/APKBUILD).
+You can reference the list of packages you need to use specific functions from [LXD package definition in AlpineLinux aports repository](https://gitlab.alpinelinux.org/alpine/infra/aports/-/blob/master/community/lxd/APKBUILD).
 Also you can find the package you need with the binary name from [AlpineLinux packages contents filter](https://pkgs.alpinelinux.org/contents).
 
 ```sh
@@ -246,7 +246,7 @@ apk add acl attr ca-certificates cgmanager dbus dnsmasq lxc iproute2 iptables ne
 apk add qemu-system-x86_64 qemu-chardev-spice qemu-hw-usb-redirect qemu-hw-display-virtio-vga qemu-img qemu-ui-spice-core ovmf sgdisk util-linux-misc virtiofsd
 ```
 
-After preparing the source from release tarball or git repository, you need follow the below steps to avoid known issues during build time:
+After preparing the source from a release tarball or git repository, you need follow the below steps to avoid known issues during build time:
 
 ```sh
 # cc1: error: /usr/local/include: No such file or directory [-Werror=missing-include-dirs]
@@ -263,12 +263,12 @@ export CGO_CPPFLAGS="-I/usr/include"
 make
 ```
 
-You can continue to `From source: Install` and `Machine setup` section to finalise setting up your Incus instance.
+You can continue to `From source: Install` and `Machine setup` sections to finalize setting up your Incus instance.
 If you still encounter issues, the following details may help you:
 
 #### `make`: gettext.cgo2.c:(.text+0x2b9): undefined reference to `libintl_gettext'
 
-If you didn't installed `libintl` from package manager, the location of required library and header file can be different.
+If you didn't install `libintl` from the package manager, the location of the required library and header file can be different.
 You can find the default location of `libintl.h` and `libintl.so` file from [AlpineLinux packages contents filter](https://pkgs.alpinelinux.org/contents?file=libintl*&path=&name=gettext-dev&branch=edge).
 Also according to [GNU gettext FAQ: integrating undefined](https://www.gnu.org/software/gettext/FAQ.html#integrating_undefined), the `-lintl` flag should be located at the near end of the link command line.