Improve div by zero const eval errors

src/test/ui/const-eval/index_out_of_bound.stderr

@@ -2,7 +2,7 @@ error[E0080]: constant evaluation error
   --> $DIR/index_out_of_bound.rs:11:19
    |
 LL | static FOO: i32 = [][0];
-   |                   ^^^^^ index out of bounds: the len is 0 but the index is 0 at $DIR/index_out_of_bound.rs:11:19: 11:24
+   |                   ^^^^^ index out of bounds: the len is 0 but the index is 0
 
 error: aborting due to previous error
 

src/test/ui/const-eval/promoted_errors.stderr

@@ -28,7 +28,7 @@ warning: constant evaluation error
   --> $DIR/promoted_errors.rs:19:20
    |
 LL |     println!("{}", 1/(1-1));
-   |                    ^^^^^^^ attempt to divide with overflow
+   |                    ^^^^^^^ attempt to divide by zero
 
 warning: attempt to divide by zero
   --> $DIR/promoted_errors.rs:22:14
@@ -40,11 +40,11 @@ warning: constant evaluation error
   --> $DIR/promoted_errors.rs:22:14
    |
 LL |     let _x = 1/(1-1);
-   |              ^^^^^^^ attempt to divide with overflow
+   |              ^^^^^^^ attempt to divide by zero
 
 warning: constant evaluation error
   --> $DIR/promoted_errors.rs:25:20
    |
 LL |     println!("{}", 1/(false as u32));
-   |                    ^^^^^^^^^^^^^^^^ attempt to divide with overflow
+   |                    ^^^^^^^^^^^^^^^^ attempt to divide by zero
 

src/test/ui/error-codes/E0080.rs

@@ -15,7 +15,6 @@ enum Enum {
     //~| const_err
     //~| const_err
     //~| const_err
-    //~| divide by zero
 }
 
 fn main() {

src/test/ui/error-codes/E0080.stderr

@@ -24,7 +24,7 @@ warning: constant evaluation error
   --> $DIR/E0080.rs:14:9
    |
 LL |     Y = (1 / 0) //~ ERROR E0080
-   |         ^^^^^^^ attempt to divide with overflow
+   |         ^^^^^^^ attempt to divide by zero
 
 error[E0080]: constant evaluation error
   --> $DIR/E0080.rs:14:9