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Change quit combination to ctrl+q/d/g

--- a/tui_main.c

+++ b/tui_main.c

@@ -7,6 +7,8 @@

 #include <locale.h>

 #include <ncurses.h>

+#define AND_CTRL(c) ((c)&037)

+

 static void usage() {

   // clang-format off

   fprintf(stderr,

@@ -249,7 +251,7 @@

   intrflush(stdscr, FALSE);

   // Receive keyboard input immediately, and receive shift, control, etc. as

   // separate events, instead of combined with individual characters.

-  raw();

+  // raw();

   // Don't echo keyboard input

   noecho();

   // Also receive arrow keys, etc.

@@ -307,7 +309,9 @@

     }

     switch (key) {

-    case 'q':

+    case AND_CTRL('q'):

+    case AND_CTRL('d'):

+    case AND_CTRL('g'):

       goto quit;

     case ' ':

       orca_run(field.buffer, markmap_r.buffer, field.height, field.width,