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/babel.md

@@ -21,7 +21,7 @@
 
 - Ignore specified comma-separated files in a directory:
 
-`babel {{path/to/input_directory}} --ignore {{ignored_files}}`
+`babel {{path/to/input_directory}} --ignore {{ignored_file1,ignored_file2,...}}`
 
 - Transpile and output as minified JavaScript:
 
@@ -29,7 +29,7 @@
 
 - Choose a set of presets for output formatting:
 
-`babel {{path/to/input_file}} --presets {{presets}}`
+`babel {{path/to/input_file}} --presets {{preset1,preset2,...}}`
 
 - Display help: