Don't exit if 'exit' or 'quit' are in quote blocks

tools/mirb/mirb.c

@@ -182,9 +182,16 @@ main(void)
     last_code_line[char_index] = '\0';
 
     if ((strcmp(last_code_line, "quit") == 0) || (strcmp(last_code_line, "exit") == 0)) {
-      /*:quit the program */
+      if (!code_block_open || !parser->sterm){
         break;
       }
+      else{
+        /* count the quit/exit commands as strings if in a quote block */
+        strcat(ruby_code, "\n");
+        strcat(ruby_code, last_code_line);
+      }
+    }
+
     else {
       if (code_block_open) {
         strcat(ruby_code, "\n");