Improve diagnostics like "initializing <type> from an expression of
type..." with "initializing <type> with an expression of type...",
which reads better. Thanks to John for the improved wording.

llvm-svn: 100873
diff --git a/clang/test/Sema/struct-compat.c b/clang/test/Sema/struct-compat.c
index ce63956..65bef9f 100644
--- a/clang/test/Sema/struct-compat.c
+++ b/clang/test/Sema/struct-compat.c
@@ -13,5 +13,5 @@
 
 struct x {int a;} r;
 int b() {
-struct x {char x;} s = r; // expected-error {{initializing 'struct x' from an expression of incompatible type 'struct x'}}
+struct x {char x;} s = r; // expected-error {{initializing 'struct x' with an expression of incompatible type 'struct x'}}
 }