Update tests for custom_code_classes_in_docs feature

Author: GuillaumeGomez

src/librustdoc/html/markdown/tests.rs

@@ -49,7 +49,7 @@ fn test_unique_id() {
 fn test_lang_string_parse() {
     fn t(lg: LangString) {
         let s = &lg.original;
-        assert_eq!(LangString::parse(s, ErrorCodes::Yes, true, None), lg)
+        assert_eq!(LangString::parse(s, ErrorCodes::Yes, true, None, true), lg)
     }
 
     t(Default::default());
@@ -290,6 +290,7 @@ fn test_header() {
             edition: DEFAULT_EDITION,
             playground: &None,
             heading_offset: HeadingOffset::H2,
+            custom_code_classes_in_docs: true,
         }
         .into_string();
         assert_eq!(output, expect, "original: {}", input);
@@ -329,6 +330,7 @@ fn test_header_ids_multiple_blocks() {
             edition: DEFAULT_EDITION,
             playground: &None,
             heading_offset: HeadingOffset::H2,
+            custom_code_classes_in_docs: true,
         }
         .into_string();
         assert_eq!(output, expect, "original: {}", input);
@@ -433,7 +435,7 @@ fn test_find_testable_code_line() {
             }
         }
         let mut lines = Vec::<usize>::new();
-        find_testable_code(input, &mut lines, ErrorCodes::No, false, None);
+        find_testable_code(input, &mut lines, ErrorCodes::No, false, None, true);
         assert_eq!(lines, expect);
     }
 
@@ -458,6 +460,7 @@ fn test_ascii_with_prepending_hashtag() {
             edition: DEFAULT_EDITION,
             playground: &None,
             heading_offset: HeadingOffset::H2,
+            custom_code_classes_in_docs: true,
         }
         .into_string();
         assert_eq!(output, expect, "original: {}", input);

tests/rustdoc-ui/feature-gate-custom_code_classes_in_docs.rs

@@ -1,5 +1,10 @@
+// check-pass
+
 /// ```{class=language-c}
 /// int main(void) { return 0; }
 /// ```
-//~^^^ ERROR 1:1: 3:8: custom classes in code blocks are unstable [E0658]
+//~^^^ WARNING custom classes in code blocks will change behaviour
+//~| NOTE found these custom classes: class=language-c
+//~| NOTE see issue #79483 <https://github.com/rust-lang/rust/issues/79483>
+//~| HELP add `#![feature(custom_code_classes_in_docs)]` to the crate attributes to enable
 pub struct Bar;

tests/rustdoc-ui/feature-gate-custom_code_classes_in_docs.stderr

@@ -1,5 +1,5 @@
-error[E0658]: custom classes in code blocks are unstable
-  --> $DIR/feature-gate-custom_code_classes_in_docs.rs:1:1
+warning: custom classes in code blocks will change behaviour
+  --> $DIR/feature-gate-custom_code_classes_in_docs.rs:3:1
    |
 LL | / /// ```{class=language-c}
 LL | | /// int main(void) { return 0; }
@@ -10,6 +10,5 @@ LL | | /// ```
    = help: add `#![feature(custom_code_classes_in_docs)]` to the crate attributes to enable
    = note: found these custom classes: class=language-c
 
-error: aborting due to previous error
+warning: 1 warning emitted
 
-For more information about this error, try `rustc --explain E0658`.