pages*: improve list placeholders and wording of descriptions (#12111)

* pages*: improve wording and list placeholders

* clamav: fix verb tenses

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>

* buzzphrase: use k instead of n for number of phrases

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>

* adguardhome: use non-default instead of different

* adguardhome: use configuration instead of config

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* goimports, module: fix list placeholders

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>

* pages*: leave stems and extensions in the same placeholders

* pages*: fix list placeholders

* pages*: fix list placeholders

* pages*: apply suggestions from code review

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

* qpdf: enclose n with backticks

Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

---------

Co-authored-by: Juri Dispan <juri.dispan@posteo.net>
Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Lena <126529524+acuteenvy@users.noreply.github.com>

pages/common/clamav.md

@@ -4,14 +4,14 @@
 > ClamAV isn't a command, but a set of commands.
 > More information: <https://www.clamav.net>.
 
-- Show the tldr page for scan files using the `clamd` daemon:
+- View documentation for scanning files using the `clamd` daemon:
 
 `tldr clamdscan`
 
-- Show the tldr page for scan files without the `clamd` daemon running:
+- View documentation for scanning files without the `clamd` daemon running:
 
 `tldr clamscan`
 
-- Show the tldr page for update the virus definitions:
+- View documentation for updating the virus definitions:
 
 `tldr freshclam`