variable.md: make example use expand

I used double quotes since it seemed required for powershell, so this
example works in both (ba)sh and powershell as well as cmd.exe.

Closes #14118

diff --git a/docs/cmdline-opts/variable.md b/docs/cmdline-opts/variable.md
index 9da1d3feebfdc40de92eca74bb8a18094399b6bd..9fe057236328c85e4bf38a8c68a34a24c1fa58a7 100644 (file)
--- a/docs/cmdline-opts/variable.md
+++ b/docs/cmdline-opts/variable.md
@@ -10,7 +10,7 @@ Multi: append
 See-also:
   - config
 Example:
-  - --variable name=smith $URL
+  - --variable name=smith --expand-url "$URL/{{name}}"
 ---
 
 # `--variable`