Auto merge of rust-lang#13571 - Alexendoo:website-code-indent, r=Centri3

Fix indentation of website code snippets

Fixes rust-lang#13568

Follow up to rust-lang#13359, I didn't catch that it swapped the `strip_prefix` out for a `trim` but they aren't interchangeable here

changelog: none

clippy_config/src/conf.rs

@@ -103,7 +103,9 @@ pub fn sanitize_explanation(raw_docs: &str) -> String {
     // Remove tags and hidden code:
     let mut explanation = String::with_capacity(128);
     let mut in_code = false;
-    for line in raw_docs.lines().map(str::trim) {
+    for line in raw_docs.lines() {
+        let line = line.strip_prefix(' ').unwrap_or(line);
+
         if let Some(lang) = line.strip_prefix("```") {
             let tag = lang.split_once(',').map_or(lang, |(left, _)| left);
             if !in_code && matches!(tag, "" | "rust" | "ignore" | "should_panic" | "no_run" | "compile_fail") {