Merge #4824

4824: Correct "debug_assertion" to "debug_assertions" to match the cfg that the rust debug assert macros use. r=matklad a=woody77

This is for #4823.

Co-authored-by: Aaron Wood <aaronwood@google.com>

Author: bors[bot]

crates/ra_project_model/src/lib.rs

@@ -594,7 +594,7 @@ fn get_rustc_cfg_options(target: Option<&str>) -> CfgOptions {
         Err(e) => log::error!("failed to get rustc cfgs: {:#}", e),
     }
 
-    cfg_options.insert_atom("debug_assertion".into());
+    cfg_options.insert_atom("debug_assertions".into());
 
     cfg_options
 }