Fix documentation of snippet

crates/rust-analyzer/src/config.rs

@@ -1364,7 +1364,23 @@ fn manual(fields: &[(&'static str, &'static str, &[&str], &str)]) -> String {
         .map(|(field, _ty, doc, default)| {
             let name = format!("rust-analyzer.{}", field.replace("_", "."));
             let doc = doc_comment_to_string(*doc);
+            if default.contains('\n') {
+                format!(
+                    r#"[[{}]]{}::
++
+--
+Default:
+----
+{}
+----
+{}
+--
+"#,
+                    name, name, default, doc
+                )
+            } else {
                 format!("[[{}]]{} (default: `{}`)::\n+\n--\n{}--\n", name, name, default, doc)
+            }
         })
         .collect::<String>()
 }

docs/user/generated_config.adoc

@@ -146,7 +146,12 @@ Only applies when `#rust-analyzer.completion.addCallParenthesis#` is set.
 --
 Whether to add parenthesis when completing functions.
 --
-[[rust-analyzer.completion.snippets]]rust-analyzer.completion.snippets (default: `{
+[[rust-analyzer.completion.snippets]]rust-analyzer.completion.snippets::
++
+--
+Default:
+----
+{
             "Arc::new": {
                 "postfix": "arc",
                 "body": "Arc::new(${receiver})",
@@ -186,10 +191,10 @@ Whether to add parenthesis when completing functions.
                 "description": "Wrap the expression in an `Option::Some`",
                 "scope": "expr"
             }
-        }`)::
+        }
-+
+----
---
 Custom completion snippets.
+
 --
 [[rust-analyzer.completion.postfix.enable]]rust-analyzer.completion.postfix.enable (default: `true`)::
 +