Update compiler/rustc_error_codes/src/error_codes/E0542.md

jesusprubio · GuillaumeGomez · web-flow · commit 956c81355a69 · 2021-02-06T17:39:11.000+01:00
Co-authored-by: Guillaume Gomez &lt;guillaume1.gomez@gmail.com&gt;
diff --git a/compiler/rustc_error_codes/src/error_codes/E0542.md b/compiler/rustc_error_codes/src/error_codes/E0542.md
@@ -1,4 +1,5 @@
-A feature since is missing.
+The `since` value is missing in a stability attribute.
+
 
 Erroneous code example:
 
