Quit on double Enter.

README.md

@@ -174,7 +174,7 @@ Remove shell completion scripts:
 
     prompt keys:
       1-N                  open the Nth search result in web browser
-      Enter                exit buku
+      double Enter         exit buku
 
 ## Operational notes
 

buku

@@ -895,6 +895,11 @@ def prompt(results):
     while True:
         try:
             nav = input("Result number to open: ")
+            if not nav:
+                nav = input("Result number to open: ")
+                if not nav:
+                    # Quit on double enter
+                    break
         except EOFError:
             return
 
@@ -1235,7 +1240,7 @@ class ExtendedArgumentParser(argparse.ArgumentParser):
         file.write('''
 prompt keys:
   1-N                  open the Nth search result in web browser
-  Enter                exit buku
+  double Enter         exit buku
 
 Version %s
 Copyright (C) 2015-2016 Arun Prakash Jana <engineerarun@gmail.com>

buku.1

@@ -157,7 +157,7 @@ Open
 .I Nth
 search result in browser.
 .TP
-.BI "Enter"
+.BI "double Enter"
 Exit buku.
 .SH ENVIRONMENT
 .TP