osx/*.md: make placeholders more compatible with CLIP ones (#9863)

* Make placeholders more compatible with CLIP ones:
- https://github.com/command-line-interface-pages/prototypes/pull/32

* Update pages/osx/xsltproc.md

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

* Update pages/osx/dd.md

Co-authored-by: Jack Lin <blueskyson1401@gmail.com>

---------

Co-authored-by: K.B.Dharun Krishna <kbdharunkrishna@gmail.com>
Co-authored-by: Jack Lin <blueskyson1401@gmail.com>

pages/osx/tail.md

@@ -6,15 +6,15 @@
 
 - Show last 'count' lines in file:
 
-`tail -n {{count}} {{path/to/file}}`
+`tail -n {{8}} {{path/to/file}}`
 
 - Print a file from a specific line number:
 
-`tail -n +{{count}} {{path/to/file}}`
+`tail -n +{{8}} {{path/to/file}}`
 
 - Print a specific count of bytes from the end of a given file:
 
-`tail -c {{count}} {{path/to/file}}`
+`tail -c {{8}} {{path/to/file}}`
 
 - Print the last lines of a given file and keep reading file until `Ctrl + C`:
 
@@ -26,4 +26,4 @@
 
 - Show last 'count' lines in 'file' and refresh every 'seconds' seconds:
 
-`tail -n {{count}} -s {{seconds}} -f {{path/to/file}}`
+`tail -n {{8}} -s {{10}} -f {{path/to/file}}`