improve grep check and robust comments

Author: Anon258

.github/workflows/release.yml

@@ -76,10 +76,9 @@ jobs:
     - name: Run y.sh cargo build
       run: |
         EMBED_LTO_BITCODE=1 CHANNEL="release" ./y.sh cargo build --release --manifest-path tests/hello-world/Cargo.toml
-        asm=$(objdump -dj .text tests/hello-world/target/release/hello_world)
-        if echo asm | grep -q "call .*mylib.*my_func" ; then 
-          echo "call my_func found in asm"
+        call_found=$(objdump -dj .text tests/hello-world/target/release/hello_world | grep -q "call .*mylib.*my_func" )
+        if call_found then 
+          echo "ERROR: call my_func found in asm"
+          echo "Test is done with LTO enabled, hence inlining should occur across crates"
           exit 1 
-        else 
-          echo "success"
         fi