Show number in error message even for one error

Co-authored-by: Adrian <adrian.iosdev@gmail.com>

tests/ui/array-slice-vec/array_const_index-0.stderr

@@ -4,6 +4,6 @@ error[E0080]: evaluation of constant value failed
 LL | const B: i32 = (&A)[1];
    |                ^^^^^^^ index out of bounds: the length is 0 but the index is 1
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0080`.

tests/ui/array-slice-vec/array_const_index-1.stderr

@@ -4,6 +4,6 @@ error[E0080]: evaluation of constant value failed
 LL | const B: i32 = A[1];
    |                ^^^^ index out of bounds: the length is 0 but the index is 1
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0080`.

tests/ui/array-slice-vec/match_arr_unknown_len.stderr

@@ -7,6 +7,6 @@ LL |         [1, 2] => true,
    = note: expected array `[u32; 2]`
               found array `[u32; N]`
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0308`.

tests/ui/array-slice-vec/slice-mut-2.stderr

@@ -9,6 +9,6 @@ help: consider changing this to be a mutable reference
 LL |     let x: &[isize] = &mut [1, 2, 3, 4, 5];
    |                        +++
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0596`.

tests/ui/array-slice-vec/slice-mut.stderr

@@ -9,6 +9,6 @@ LL |     let y: &mut[_] = &x[2..4];
    = note: expected mutable reference `&mut [_]`
                       found reference `&[isize]`
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0308`.

tests/ui/array-slice-vec/slice-to-vec-comparison.stderr

@@ -7,6 +7,6 @@ LL |     a > b;
    = note: expected reference `&[_; 0]`
               found reference `&Vec<u8>`
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0308`.

tests/ui/array-slice-vec/vec-macro-with-comma-only.stderr

@@ -6,5 +6,5 @@ LL |     vec![,];
    |
    = note: while trying to match end of macro
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 

tests/ui/array-slice-vec/vec-mut-iter-borrow.stderr

@@ -9,6 +9,6 @@ LL |     for x in &mut xs {
 LL |         xs.push(1)
    |         ^^ second mutable borrow occurs here
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0499`.

tests/ui/array-slice-vec/vec-res-add.stderr

@@ -6,6 +6,6 @@ LL |     let k = i + j;
    |             |
    |             Vec<R>
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0369`.

tests/ui/array-slice-vec/vector-no-ann.stderr

@@ -9,6 +9,6 @@ help: consider giving `_foo` an explicit type, where the type for type parameter
 LL |     let _foo: Vec<T> = Vec::new();
    |             ++++++++
 
-error: aborting due to previous error
+error: aborting due to 1 previous error
 
 For more information about this error, try `rustc --explain E0282`.