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/prt-get.md

@@ -5,19 +5,19 @@
 
 - Install a package:
 
-`prt-get install {{package_name}}`
+`prt-get install {{package}}`
 
 - Install a package with dependency handling:
 
-`prt-get depinst {{package_name}}`
+`prt-get depinst {{package}}`
 
 - Update a package manually:
 
-`prt-get upgrade {{package_name}}`
+`prt-get upgrade {{package}}`
 
 - Remove a package:
 
-`prt-get remove {{package_name}}`
+`prt-get remove {{package}}`
 
 - Upgrade the system from the local ports tree:
 
@@ -25,7 +25,7 @@
 
 - Search the ports tree:
 
-`prt-get search {{package_name}}`
+`prt-get search {{query}}`
 
 - Search for a file in a package: