Merge #4526

4526: Use a flat play icon instead of the blue emoji with test code lens r=kjeremy a=aloucks

@lnicola 

Restores this commit:
55e914a

That was effectively wiped out by this code formatting commit:
dc217bd
3d44525

Co-authored-by: Aaron Loucks <aloucks@cofront.net>

Author: bors[bot]

crates/rust-analyzer/src/main_loop/handlers.rs

@@ -802,11 +802,11 @@ pub fn handle_code_lens(
         for runnable in world.analysis().runnables(file_id)? {
             let (run_title, debugee) = match &runnable.kind {
                 RunnableKind::Test { .. } | RunnableKind::TestMod { .. } => {
-                    ("▶️\u{fe0e}Run Test", true)
+                    ("▶\u{fe0e} Run Test", true)
                 }
                 RunnableKind::DocTest { .. } => {
                     // cargo does not support -no-run for doctests
-                    ("▶️\u{fe0e}Run Doctest", false)
+                    ("▶\u{fe0e} Run Doctest", false)
                 }
                 RunnableKind::Bench { .. } => {
                     // Nothing wrong with bench debugging