Don't require all doc fences to be valid for identifying rust code

Author: Veykril

crates/ide/src/syntax_highlighting/inject.rs

@@ -85,6 +85,8 @@ const RUSTDOC_FENCE_TOKENS: &[&'static str] = &[
     "ignore",
     "no_run",
     "compile_fail",
+    "allow_fail",
+    "test_harness",
     "edition2015",
     "edition2018",
     "edition2021",
@@ -181,7 +183,7 @@ pub(super) fn doc_comment(
                     is_codeblock = !is_codeblock;
                     // Check whether code is rust by inspecting fence guards
                     let guards = &line[idx + RUSTDOC_FENCE.len()..];
-                    let is_rust = guards.split(',').all(|sub| is_rustdoc_fence_token(sub.trim()));
+                    let is_rust = guards.split(',').any(|sub| is_rustdoc_fence_token(sub.trim()));
                     is_doctest = is_codeblock && is_rust;
                     continue;
                 }

crates/rust-analyzer/src/markdown.rs

@@ -8,6 +8,8 @@ const RUSTDOC_CODE_BLOCK_ATTRIBUTES_RUST_SPECIFIC: &[&str] = &[
     "ignore",
     "no_run",
     "compile_fail",
+    "allow_fail",
+    "test_harness",
     "edition2015",
     "edition2018",
     "edition2021",
@@ -28,7 +30,7 @@ pub(crate) fn format_docs(src: &str) -> String {
 
             if in_code_block {
                 is_rust =
-                    header.split(',').all(|sub| is_rust_specific_code_block_attribute(sub.trim()));
+                    header.split(',').any(|sub| is_rust_specific_code_block_attribute(sub.trim()));
 
                 if is_rust {
                     line = "```rust";