rev: update page (#13554)

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>

pages/common/rev.md

@@ -1,8 +1,12 @@
 # rev
 
-> Reverse a line of text.
+> Reverse a line of text or a file.
 > More information: <https://manned.org/rev>.
 
+- Reverse text typed into terminal:
+
+`rev`
+
 - Reverse the text string "hello":
 
 `echo "hello" | rev`
@@ -10,3 +14,15 @@
 - Reverse an entire file and print to `stdout`:
 
 `rev {{path/to/file}}`
+
+- Use '\0' as a line separator (zero termination):
+
+`rev -0 {{path/to/file}}`
+
+- Display help:
+
+`rev -h`
+
+- Display version:
+
+`rev -V`