restore shell escape

pub/lib/commands.cpp

@@ -51,9 +51,7 @@ bool frida_command( string cmd )
 
     // Extract overwrite marker:
     NOlm::overwrite = 0;
-    if( cmd=="!" )
-        throw "overwrite marker '!' must immediately follow a command";
-    if ( cmd!="" && cmd[cmd.size()-1]=='!' ) {
+    if ( cmd.size()>1 && cmd[cmd.size()-1]=='!' ) {
         NOlm::overwrite = 1;
         cmd.erase(cmd.size()-1,1);
     }

pub/lib/toplevel.cpp

@@ -161,7 +161,7 @@ void CFrida::interactive()
             cerr << "'" << cmdline << "' failed: " << ex << endl;
             NMacro::clear();
         } catch( const char* ex ) {
-            cerr << "BUG: '" << cmdline << "' failed with unforeseen message " << ex << endl;
+            cerr << "BUG: '" << cmdline << "' failed with unforeseen message: " << ex << endl;
             NMacro::clear();
         } catch( ... ) {
             cerr << "BUG: '" << cmdline << "' failed with unforeseen exception\n";