Updated SC2034 (markdown)

SC2034.md

@@ -14,6 +14,8 @@
 
 Variables not used for anything are often associated with bugs, so ShellCheck warns about them. 
 
+Also note that something like `local let foo=42` does not make a `let` statement local -- it instead declares an additional local variable named `let`.
+
 ### Exceptions
 
 ShellCheck may not always realize that the variable is in use (especially with indirection), and may not realize you don't care (with throwaway variables or unimplemented features).