dos2unix, unix2dos, mac2unix, unix2mac: use consistent naming

Apply suggestions from code review

Co-authored-by: Zlatan Vasović <zlatanvasovic@gmail.com>

pages/linux/dos2unix.md

@@ -1,12 +1,12 @@
 # dos2unix
 
-> Change dos-style line endings to unix-style.
+> Change DOS-style line endings to Unix-style.
 > Replaces CRLF with CR.
 
 - Change line endings of a file:
 
 `dos2unix {{filename}}`
 
-- Create a copy with unix-style line endings:
+- Create a copy with Unix-style line endings:
 
 `dos2unix -n {{filename}} {{new_filename}}`

pages/linux/mac2unix.md

@@ -1,12 +1,12 @@
 # mac2unix
 
-> Change mac-style line endings to unix-style.
+> Change macOS-style line endings to Unix-style.
 > Replaces LF with CR.
 
 - Change line endings of a file:
 
 `mac2unix {{filename}}`
 
-- Create a copy with unix-style line endings:
+- Create a copy with Unix-style line endings:
 
 `mac2unix -n {{filename}} {{new_filename}}`

pages/linux/unix2dos.md

@@ -1,12 +1,12 @@
 # unix2dos
 
-> Change unix-style line endings to dos-style.
+> Change Unix-style line endings to DOS-style.
 > Replaces CR with CRLF.
 
 - Change line endings of a file:
 
 `unix2dos {{filename}}`
 
-- Create a copy with dos-style line endings:
+- Create a copy with DOS-style line endings:
 
 `unix2dos -n {{filename}} {{new_filename}}`

pages/linux/unix2mac.md

@@ -1,12 +1,12 @@
 # unix2mac
 
-> Change unix-style line endings to mac-style.
+> Change Unix-style line endings to macOS-style.
 > Replaces CR with LF.
 
 - Change line endings of a file:
 
 `unix2mac {{filename}}`
 
-- Create a copy with mac-style line endings:
+- Create a copy with macOS-style line endings:
 
 `unix2mac -n {{filename}} {{new_filename}}`