sort: swap examples to introduce options gradually

pages/common/sort.md

@@ -10,14 +10,14 @@
 
 `sort -r {{filename}}`
 
-- Sort the passwd file by the 3rd field, numerically:
-
-`sort -t: -k 3n /etc/passwd`
-
 - Sort a file using numeric rather than alphabetic order:
 
 `sort -n {{filename}}`
 
+- Sort the passwd file by the 3rd field, numerically:
+
+`sort -t: -k 3n /etc/passwd`
+
 - Sort a file preserving only unique lines:
 
 `sort -u {{filename}}`