fix typo

src/signal.cpp

@@ -1,7 +1,7 @@
-#include <curses.h>
-#include <csignal>
-#include <iostream>
 #include "memory.h"
+#include <csignal>
+#include <curses.h>
+#include <iostream>
 void safe_exit(int code) {
   switch (code) {
   case SIGTERM:
@@ -18,7 +18,7 @@ void safe_exit(int code) {
     break;
 
   case SIGSEGV:
-      std::cerr << "\nreceived SIGSEGV(segmentaiton fault) exiting...\nIf this "
+    std::cerr << "\nreceived SIGSEGV(segmentation fault) exiting...\nIf this "
                  "repeats please report it as a bug\n";
     break;