improve errmsg ("failed" vs BUG)

pub/lib/toplevel.cpp

@@ -158,13 +158,13 @@ void CFrida::interactive()
             cmdline = NMacro::readln( NOlm::sel_str() + " > " );
             execute_cmd( cmdline );
         } catch( string& ex ) {
-            cerr << "'" << cmdline << "' failed(S): " << ex << endl;
+            cerr << "'" << cmdline << "' failed: " << ex << endl;
             NMacro::clear();
         } catch( const char* ex ) {
-            cerr << "'" << cmdline << "' failed(C): " << ex << endl;
+            cerr << "BUG: '" << cmdline << "' failed with unforeseen message " << ex << endl;
             NMacro::clear();
         } catch( ... ) {
-            cerr << "BUG: catched unexpected exception\n";
+            cerr << "BUG: '" << cmdline << "' failed with unforeseen exception\n";
             NMacro::clear();
         }
     }