Update docs/installing.md: add missing periods

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

docs/installing.md

@@ -18,9 +18,9 @@ The Ansible playbook's tasks are tagged, so that certain parts of the Ansible pl
 
 The general command syntax for installation (and also maintenance) is: `ansible-playbook -i inventory/hosts setup.yml --tags=COMMA_SEPARATED_TAGS_GO_HERE`. It is recommended to get yourself familiar with the [playbook tags](playbook-tags.md) before proceeding.
 
-If you **don't** use SSH keys for authentication, but rather a regular password, you may need to add `--ask-pass` to the all Ansible commands
+If you **don't** use SSH keys for authentication, but rather a regular password, you may need to add `--ask-pass` to the all Ansible commands.
 
-If you **do** use SSH keys for authentication, **and** use a non-root user to *become* root (sudo), you may need to add `-K` (`--ask-become-pass`) to all Ansible commands
+If you **do** use SSH keys for authentication, **and** use a non-root user to *become* root (sudo), you may need to add `-K` (`--ask-become-pass`) to all Ansible commands.
 
 There 2 ways to start the installation process - depending on whether you're [Installing a brand new server (without importing data)](#installing-a-brand-new-server-without-importing-data) or [Installing a server into which you'll import old data](#installing-a-server-into-which-youll-import-old-data).