man: clarify quoting of $ in command lines (#39494)

When the special executable prefix `:` is used, `$$` yield the literal `$$`.
2025-10-31 15:28:57 +09:00
parent 4207abb6e1
commit bfb365d924
1 changed files with 2 additions and 1 deletions
@@ -1485,7 +1485,8 @@ ExecStart=/bin/echo $ONE $TWO $THREE</programlisting>
    <literal>too</literal>.
    </para>

-    <para>To pass a literal dollar sign, use <literal>$$</literal>.
+    <para>Unless for commands with the special executable prefix <literal>:</literal>,
+    to pass a literal dollar sign, use <literal>$$</literal>.
    Variables whose value is not known at expansion time are treated
    as empty strings. Note that the first argument (i.e. the program
    to execute) may not be a variable.</para>