fixed linter warnings

user/how-to-guides/backup-emergency-restore-v4.rst

@@ -160,7 +160,7 @@ Emergency recovery instructions
          [user@restore ~]$ xmlstarlet sel -T -t -m //domain \
              -v 'concat(.//property[@name="name"], " ", .//feature[@name="backup-path"])' \
              -n qubes.xml
-         
+
          anon-whonix
          debian-11
          default-mgmt-dvm

user/how-to-guides/how-to-install-software.rst

@@ -33,7 +33,6 @@ Installing software from default repositories
 .. figure:: /attachment/doc/r4.1-dom0-appmenu-select.png
    :alt: The Applications tab in Qube Settings
 
- 
 
 Installing software from other sources
 --------------------------------------
@@ -87,7 +86,6 @@ This method assumes that you are trying to follow instructions to install some p
 .. image:: /attachment/doc/r4.1-dom0-appmenu-select.png
    :alt:
 
- 
 
 Troubleshooting
 ---------------
@@ -252,7 +250,7 @@ Example policy file in R4.1 (with Whonix installed, but not set as default Updat
       # any VM with tag `whonix-updatevm` should use `sys-whonix`; this tag is added to `whonix-gw` and `whonix-ws` during installation and is preserved during template clone
       @tag:whonix-updatevm @default allow,target=sys-whonix
       @tag:whonix-updatevm @anyvm deny
-      
+
       # other templates use sys-net
       @type:TemplateVM @default allow,target=sys-net
       @anyvm @anyvm deny
@@ -277,15 +275,15 @@ Snap packages do not use the normal update channels for Debian and Fedora (apt a
           qubes-snapd-helper           noarch   1.0.4-1.fc36                        qubes-vm-r4.1-current   10 k
          Installing dependencies:
          [...]
-         
+
          Transaction Summary
          ========================================================================================================
          Install  19 Packages
-         
+
          Total download size: 27 M
          Installed size: 88 M
          Is this ok [y/N]: y
-         
+
          Downloading Packages:
          [..]
          Failed to resolve booleanif statement at /var/lib/selinux/targeted/tmp/modules/200/snappy/cil:1174
@@ -293,7 +291,7 @@ Snap packages do not use the normal update channels for Debian and Fedora (apt a
          [...]
          Last metadata expiration check: 0:33:05 ago on Thu 03 Nov 2022 04:34:06.
          Notifying dom0 about installed applications
-         
+
          Installed:
            snapd-2.56.2-4.fc36.x86_64                                              qubes-snapd-helper-1.0.4-1.fc36.noarch
          [...]