[stmt.return] Replace the uses of "local variable"

... with "block variable with automatic storage duration"

Author: frederick-vs-ja

source/statements.tex

@@ -947,11 +947,11 @@
 The copy-initialization of the result of the call is sequenced before the
 destruction of temporaries at the end of the full-expression established
 by the operand of the \tcode{return} statement, which, in turn, is sequenced
-before the destruction of local variables\iref{stmt.jump} of the block
+before the destruction of block variables with automatic storage duration\iref{stmt.jump} of the block
 enclosing the \tcode{return} statement.
 \begin{note}
 These operations
-are sequenced before the destruction of local variables
+are sequenced before the destruction of block variables with automatic storage duration
 in each remaining enclosing block of the function\iref{stmt.dcl},
 which, in turn,
 is sequenced before the evaluation of