clarify documentation about variable substituion

Milo123459 · web-flow · commit 9ac9811196d8 · 2023-09-25T14:53:38.000+01:00
diff --git a/std/src/process.rs b/std/src/process.rs
@@ -609,7 +609,7 @@ impl Command {
     ///
     /// Note that the argument is not passed through a shell, but given
     /// literally to the program. This means that shell syntax like quotes,
-    /// escaped characters, word splitting, glob patterns, substitution, etc.
+    /// escaped characters, word splitting, glob patterns, variable substitution, etc.
     /// have no effect.
     ///
     /// # Examples
