checker,builder: rename `details:` to `Details:`

vlib/v/builder/builder.v

@@ -313,7 +313,7 @@ fn (b &Builder) print_warnings_and_errors() {
 			ferror := util.formatted_error(kind, err.message, err.file_path, err.pos)
 			eprintln(ferror)
 			if err.details.len > 0 {
-				eprintln('details: $err.details')
+				eprintln('Details: $err.details')
 			}
 			// eprintln('')
 			if i > b.max_nr_errors {
@@ -335,7 +335,7 @@ fn (b &Builder) print_warnings_and_errors() {
 			ferror := util.formatted_error(kind, err.message, err.file_path, err.pos)
 			eprintln(ferror)
 			if err.details.len > 0 {
-				eprintln('details: $err.details')
+				eprintln('Details: $err.details')
 			}
 			// eprintln('')
 			if i > b.max_nr_errors {

vlib/v/checker/tests/fn_args.out

@@ -16,4 +16,4 @@ vlib/v/checker/tests/fn_args.vv:8:5: error: cannot use `fn (&int)` as `fn (int)`
     7 | arr([5]!)
     8 | fun(fn(i &int){})
       |     ~~~~~~~~~~~~
-details: ``'s expected fn argument: `` is NOT a pointer, but the passed fn argument: `i` is a pointer
+Details: ``'s expected fn argument: `` is NOT a pointer, but the passed fn argument: `i` is a pointer

vlib/v/checker/tests/non_matching_functional_args.out

@@ -5,7 +5,7 @@ vlib/v/checker/tests/non_matching_functional_args.vv:27:6: error: cannot use `fn
       |         ~~~~~~~~~~~~~~~~~~
    28 |         t.rename()
    29 |         println(t.name)
-details: `main.MyFn`'s expected fn argument: `zzzz` is NOT a pointer, but the passed fn argument: `t` is a pointer
+Details: `main.MyFn`'s expected fn argument: `zzzz` is NOT a pointer, but the passed fn argument: `t` is a pointer
 vlib/v/checker/tests/non_matching_functional_args.vv:31:6: error: cannot use `fn (mut Table)` as `fn (Table)` in argument 1 to `sum`
    29 |         println(t.name)
    30 |     })
@@ -13,4 +13,4 @@ vlib/v/checker/tests/non_matching_functional_args.vv:31:6: error: cannot use `fn
       |         ~~~
    32 |     sum(yyy)
    33 | }
-details: `main.MyFn`'s expected fn argument: `zzzz` is NOT a pointer, but the passed fn argument: `mytable` is a pointer
+Details: `main.MyFn`'s expected fn argument: `zzzz` is NOT a pointer, but the passed fn argument: `mytable` is a pointer

vlib/v/checker/tests/unimplemented_interface_b.out

@@ -4,4 +4,4 @@ vlib/v/checker/tests/unimplemented_interface_b.vv:13:6: error: `Cat` incorrectly
    13 |     foo(c)
       |         ^
    14 | }
-details: main.Animal has `name() string`
+Details: main.Animal has `name() string`

vlib/v/checker/tests/unimplemented_interface_c.out

@@ -4,4 +4,4 @@ vlib/v/checker/tests/unimplemented_interface_c.vv:12:6: error: `Cat` incorrectly
    12 |     foo(Cat{})
       |         ~~~~~
    13 | }
-details: main.Animal has `name()`
+Details: main.Animal has `name()`

vlib/v/checker/tests/unimplemented_interface_d.out

@@ -4,4 +4,4 @@ vlib/v/checker/tests/unimplemented_interface_d.vv:12:6: error: `Cat` incorrectly
    12 |     foo(Cat{})
       |         ~~~~~
    13 | }
-details: main.Animal has `speak(s string)`
+Details: main.Animal has `speak(s string)`

vlib/v/checker/tests/unimplemented_interface_e.out

@@ -5,11 +5,11 @@ vlib/v/checker/tests/unimplemented_interface_e.vv:12:6: error: `Cat` incorrectly
       |         ~~~~~
    13 |     _ = Animal(Cat{})
    14 | }
-details: main.Animal has `speak(s string)`
+Details: main.Animal has `speak(s string)`
 vlib/v/checker/tests/unimplemented_interface_e.vv:13:6: error: `Cat` incorrectly implements method `speak` of interface `Animal`: expected `string`, not `&string` for parameter 1
    11 | fn main() {
    12 |     foo(Cat{})
    13 |     _ = Animal(Cat{})
       |         ~~~~~~~~~~~~~
    14 | }
-details: main.Animal has `speak(s string)`
+Details: main.Animal has `speak(s string)`

vlib/v/checker/tests/unimplemented_interface_f.out

@@ -4,4 +4,4 @@ vlib/v/checker/tests/unimplemented_interface_f.vv:11:13: error: `Cat` incorrectl
    11 |     animals << Cat{}
       |                ~~~~~
    12 | }
-details: main.Animal has `speak(s string)`
+Details: main.Animal has `speak(s string)`

vlib/v/gen/cgen.v

@@ -5632,28 +5632,14 @@ fn (g &Gen) get_all_test_function_names() []string {
 	mut tsuite_begin := ''
 	mut tsuite_end := ''
 	for _, f in g.table.fns {
-		if f.name == 'testsuite_begin' {
-			tsuite_begin = f.name
-			continue
-		}
-		if f.name == 'testsuite_end' {
-			tsuite_end = f.name
-			continue
-		}
-		if f.name.starts_with('test_') {
-			tfuncs << f.name
-			continue
-		}
-		// What follows is for internal module tests
-		// (they are part of a V module, NOT in main)
-		if f.name.contains('.test_') {
-			tfuncs << f.name
-			continue
-		}
 		if f.name.ends_with('.testsuite_begin') {
 			tsuite_begin = f.name
 			continue
 		}
+		if f.name.contains('.test_') {
+			tfuncs << f.name
+			continue
+		}
 		if f.name.ends_with('.testsuite_end') {
 			tsuite_end = f.name
 			continue