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/linux/sxiv.md

@@ -5,7 +5,7 @@
 
 - Open an image:
 
-`sxiv {{path/to/file}}`
+`sxiv {{path/to/image}}`
 
 - Open an image in fullscreen mode:
 
@@ -15,10 +15,10 @@
 
 `echo {{path/to/file}} | sxiv -i`
 
-- Open a space-separated list of images as a slideshow:
+- Open one or more images as a slideshow:
 
-`sxiv -S {{seconds}} {{path/to/file}}`
+`sxiv -S {{seconds}} {{path/to/image1 path/to/image2}}`
 
-- Open a space-separated list of images in thumbnail mode:
+- Open one or more images in thumbnail mode:
 
-`sxiv -t {{path/to/file}}`
+`sxiv -t {{path/to/image1 path/to/image2}}`