pages/*, style-guide: update contents, fix Markdown (#10492)

* pages/*, style-guide: update pages, fix Markdown (commit 1)

* Update pages

* style-guide.de: update page

* Apply suggestions from code review

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

* Apply suggestions from code review

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

* pip3: remove search command

* rpm: update path placeholder

Co-authored-by: pixel <pixel+github@chrissx.de>

* Update pages/linux/pkgfile.md

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

---------

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

pages/linux/rpm.md

@@ -14,7 +14,7 @@
 
 - Forcibly install a package regardless of currently installed versions:
 
-`rpm --upgrade {{package_name.rpm}} --force`
+`rpm --upgrade {{path/to/package.rpm}} --force`
 
 - Identify owner of a file and show version of the package:
 
@@ -26,7 +26,7 @@
 
 - Show scriptlets from an RPM file:
 
-`rpm --query --package --scripts {{package_name.rpm}}`
+`rpm --query --package --scripts {{package.rpm}}`
 
 - Show changed, missing and/or incorrectly installed files of matching packages:
 
@@ -34,4 +34,4 @@
 
 - Display the changelog of a specific package:
 
-`rpm --query --changelog {{package_name}}`
+`rpm --query --changelog {{package}}`