docs: improve uptime section

cakebaker · sylvestre · web-flow · commit e3468ba4290c · 2024-05-12T14:26:59.000+02:00
Co-authored-by: Sylvestre Ledru &lt;sylvestre@debian.org&gt;
diff --git a/docs/src/extensions.md b/docs/src/extensions.md
@@ -92,4 +92,4 @@ also provides a `-v`/`--verbose` flag.
 
 ## `uptime`
 
-`uptime` provides `-s`/`--since` to show since when the system is up.
+Similar to the proc-ps implementation and unlike GNU/Coreutils, `uptime` provides `-s`/`--since` to show since when the system is up.

Original file line number	Diff line number	Diff line change
@@ -92,4 +92,4 @@ also provides a `-v`/`--verbose` flag.
`92`	`92`
`93`	`93`	## `uptime`
`94`	`94`
`95`		-`uptime` provides `-s`/`--since` to show since when the system is up.
	`95`	+Similar to the proc-ps implementation and unlike GNU/Coreutils, `uptime` provides `-s`/`--since` to show since when the system is up.