slight fix

src/echo.c

@@ -12,6 +12,6 @@ main(int argc, char *argv[])
     (void)fputs(*argv, stdout);   // Print argv
     if(*++argv) putchar(' ');     // If multiple things in argv, print a space between them.
   }
-  if(nflag) putchar('\n');
+  if(!nflag) putchar('\n');
   return 0;
 }