tests: update failed cases for new constant declaration syntax

tests/cases/exhaustiveness/missing_enums.stderr

@@ -3,18 +3,18 @@ error[0083]: non-exhaustive patterns: `(Option::None, Option::None)` not covered
 5 |     loop {
 6 |       return match (left, right) {
   |                    ^^^^^^^^^^^^^ pattern `(Option::None, Option::None)` not covered
-7 |         (Option::Some(a), Option::Some(b)) => a + b,
+7 |         (Option.Some(a), Option.Some(b)) => a + b,
 
 error[0083]: non-exhaustive patterns: `Direction::South`, and `Direction::East` not covered
   --> $DIR/missing_enums.hash:25:16
 24 |   direction_to_int := (dir: Direction) -> i32 => {
 25 |     return match dir {
    |                  ^^^ patterns `Direction::South`, and `Direction::East` not covered
-26 |       Direction::North => 1,
+26 |       Direction.North => 1,
 
 error[0083]: non-exhaustive patterns: `(Direction::South, Direction::South)`, `(Direction::South, Direction::West)`, `(Direction::South, Direction::East)` and 9 more not covered
   --> $DIR/missing_enums.hash:33:11
 32 |   join_directions := (dir: Direction, other: Direction) -> Direction => {
 33 |       match (dir, other) {
    |             ^^^^^^^^^^^^ patterns `(Direction::South, Direction::South)`, `(Direction::South, Direction::West)`, `(Direction::South, Direction::East)` and 9 more not covered
-34 |           (Direction::North, Direction::South) => Direction::North,
+34 |           (Direction.North, Direction.South) => Direction.North,

tests/cases/parser/literals/double_colon_in_map_literal.stderr

@@ -1,6 +1,5 @@
-error: expected a name here
- --> $DIR/double_colon_in_map_literal.hash:3:15
+error: expected an expression, however received a `::`
+ --> $DIR/double_colon_in_map_literal.hash:3:13
 2 |   
 3 |   k := map!{ 1::2 };
-  |                 ^ 
-  = help: expected a `identifier`
+  |               ^^ 

tests/cases/parser/misc/triple_colon_in_access_name.stderr

@@ -1,6 +1,6 @@
-error: expected a name here
- --> $DIR/triple_colon_in_access_name.hash:3:7
+error: expected field name access or a method call
+ --> $DIR/triple_colon_in_access_name.hash:3:5
 2 |   
-3 |   a::b:::c<int>();
-  |         ^ 
+3 |   a.b.:c<int>();
+  |       ^ 
   = help: expected a `identifier`

tests/cases/parser/types/malformed_function_type.stderr

@@ -1,6 +1,6 @@
 error: unexpectedly encountered a `>`
- --> $DIR/malformed_function_type.hash:3:20
+ --> $DIR/malformed_function_type.hash:3:21
 2 |   
 3 |   str_eq: (str, str) > str;
-  |                      ^ 
-  = help: expected a `=`
+  |                       ^ 
+  = help: expected either `:`, or `=`

tests/cases/semantics/pats/intrinsics_in_pats.stderr

@@ -1,7 +1,7 @@
 error[0024]: cannot use an intrinsic in pattern position
  --> $DIR/intrinsics_in_pats.hash:5:5
 4 |     match 1 {
-5 |       Intrinsics::user_error => {}
-  |       ^^^^^^^^^^^^^^^^^^^^^^ 
+5 |       Intrinsics.user_error => {}
+  |       ^^^^^^^^^^^^^^^^^^^^^ 
 6 |     }
   = info: cannot use this in pattern position as it refers to a compiler intrinsic