Increase vim compatibility

Vim has this, and it's almost easter, so clearly we should have it too.
Also it's from Monty Python, which makes it even more fitting.

HEAD KNIGHT: Ni!
KNIGHTS: Ni! Ni! Ni!
ARTHUR: Who are you?
HEAD KNIGHT: We are the Knights Who Say... Ni!
ARTHUR: No! Not the Knights Who Say Ni!
HEAD KNIGHT: The same!
BEDEVERE: Who are they?
HEAD KNIGHT: We are the keepers of the sacred words: Ni, Pen, and Ni-wom!
RANDOM: Ni-wom!
ARTHUR: Those who hear them seldom live to tell the tale!
HEAD KNIGHT: The Knights Who Say Ni demand a sacrifice!
ARTHUR: Knights of Ni, we are but simple travellers who seek the enchanter who lives beyond these woods.
HEAD KNIGHT: Ni! Ni! Ni! Ni!
ARTHUR and PARTY: Oh, ow!
HEAD KNIGHT: We shall say 'nee' again to you if you do not appease us.
ARTHUR: Well, what is it you want?
HEAD KNIGHT: We want... a shrubbery!
[dramatic chord]
ARTHUR: A what?
HEAD KNIGHT: Ni! Ni!
ARTHUR and PARTY: Oh, ow!
ARTHUR: Please, please! No more! We shall find a shrubbery.
HEAD KNIGHT: You must return here with a shrubbery or else you will never pass through this wood alive!
ARTHUR: O Knights of Ni, you are just and fair, and we will return with a shrubbery.
HEAD KNIGHT: One that looks nice.
ARTHUR: Of course.
HEAD KNIGHT: And not too expensive.
ARTHUR: Yes.
HEAD KNIGHTS: Now... go!

ARTHUR: Old crone! Is there anywhere in this town where we could buy a shrubbery!
[dramatic chord]
CRONE: Who sent you?
ARTHUR: The Knights Who Say Nee.
CRONE: Agh! No! Never! We have no shrubberies here.
ARTHUR: If you do not tell us where we can buy a shrubbery, my friend
and I will say... we will say... `nee'.
CRONE: Agh! Do your worst!
ARTHUR: Very well! If you will not assist us voluntarily,... Ni!
CRONE: No! Never! No shrubberies!
ARTHUR: Ni!
BEDEVERE: Noo! Noo!
ARTHUR: No, no, no, no -- it's not that, it's 'Ni'.
BEDEVERE: Noo!
ARTHUR: No, no -- 'Ni'. You're not doing it properly.
BEDEVERE: Noo! Ni!
ARTHUR: That's it, that's it, you've got it.
ARTHUR and BEDEVERE: Ni! Ni!
ROGER: Are you saying 'Ni' to that old woman?
ARTHUR: Um, yes.
ROGER: Oh, what sad times are these when passing ruffians can say `Ni' at will to old ladies. There is a pestilence upon this land, nothing is sacred. Even those who arrange and design shrubberies are under considerable economic stress at this period in history.
ARTHUR: Did you say `shrubberies'?
ROGER: Yes, shrubberies are my trade -- I am a shrubber. My name is Roger the Shrubber. I arrange, design, and sell shrubberies.
BEDEVERE: Ni!
ARTHUR: No! No, no, no! No!
ARTHUR: O, Knights of Ni, we have brought you your shrubbery. May we go now?
HEAD KNIGHT: It is a good shrubbery. I like the laurels particularly. But there is one small problem.
ARTHUR: What is that?
HEAD KNIGHT: We are now... no longer the Knights Who Say Ni.
RANDOM: Ni!
HEAD KNIGHT: Shh shh. We are now the Knights Who Say Ecky-ecky-ecky- ecky-pikang-zoom-boing-mumble-mumble.
RANDOM: Ni!
HEAD KNIGHT: Therefore, we must give you a test.
ARTHUR: What is this test, O Knights of-- Knights Who 'Til Recently Said Ni?
HEAD KNIGHT: Firstly, you must find... another shrubbery!
[dramatic chord]
ARTHUR: Not another shrubbery!
HEAD KNIGHT: Then, when you have found the shrubbery, you must place it here beside this shrubbery, only slightly higher so you get a two-level effect with a little path running down the middle.
RANDOM: A path! A path! Ni!
HEAD KNIGHT: Then, when you have found the shrubbery, you must cut down the mightiest tree in the forest... with... a herring!
[dramatic chord]
ARTHUR: We shall do no such thing!
HEAD KNIGHT: Oh, please!
ARTHUR: Cut down a tree with a herring? It can't be done.
KNIGHTS: Aaaaugh! Aaaugh!
HEAD KNIGHT: Don't say that word.
ARTHUR: What word?
HEAD KNIGHT: I cannot tell, suffice to say is one of the words the Knights of Ni cannot hear.
ARTHUR: How can we not say the word if you don't tell us what it is?
KNIGHTS: Aaaaugh! Aaaugh!
ARTHUR: What, `is'?
HEAD KNIGHT: No, not `is' -- we couldn't get vary far in life not saying `is'.
BEDEVERE: My liege, it's Sir Robin!
MINSTREL (singing): Packing it in and packing it up
And sneaking away and buggering up
And chickening out and pissing about
Yes, bravely he is throwing in the sponge
ARTHUR: Oh, Robin!
ROBIN: My liege! It's good to see you!
KNIGHTS: Aaaaugh!
HEAD KNIGHT: He said the word!
ARTHUR: Surely you've not given up your quest for the Holy Grail?
MINSTREL (singing): He is sneaking away and buggering up--
ROBIN: Shut up! No, no no-- far from it.
HEAD KNIGHT: He said the word again!
ROBIN: I was looking for it.
KNIGHTS: Aaaaugh!
ROBIN: Uh, here, here in this forest.
ARTHUR: No, it is far from--
KNIGHTS: Aaaaugh!
HEAD KNIGHT: Aaaaugh! Stop saying the word!
ARTHUR: Oh, stop it!
KNIGHTS: Aaaaugh!
HEAD KNIGHT: Oh! He said it again!
ARTHUR: Patsy!
HEAD KNIGHT: Aaugh! I said it! I said it! Ooh! I said it again!
KNIGHTS: Aaaaugh!

(cherry picked from commit 5a4b51a784b4332242191a61a24d72bca3ff60dc)

3 files changed, 9 insertions, 2 deletions

diff --git a/qutebrowser/completion/models/util.py b/qutebrowser/completion/models/util.py
index 224004d1b..21dcf2e9f 100644
--- a/qutebrowser/completion/models/util.py
+++ b/qutebrowser/completion/models/util.py
@@ -46,7 +46,8 @@ def get_cmd_completions(info, include_hidden, include_aliases, prefix=''):
         hide_debug = obj.debug and not objects.args.debug
         hide_mode = (usertypes.KeyMode.normal not in obj.modes and
                      not include_hidden)
-        if not (hide_debug or hide_mode or obj.deprecated):
+        hide_ni = obj.name == 'Ni!'
+        if not (hide_debug or hide_mode or obj.deprecated or hide_ni):
             bindings = ', '.join(cmd_to_keys.get(obj.name, []))
             cmdlist.append((prefix + obj.name, obj.desc, bindings))
 
diff --git a/qutebrowser/components/misccommands.py b/qutebrowser/components/misccommands.py
index 5af483aba..120806bfe 100644
--- a/qutebrowser/components/misccommands.py
+++ b/qutebrowser/components/misccommands.py
@@ -385,3 +385,9 @@ def devtools_focus(tab: apitypes.Tab) -> None:
         tab.data.splitter.cycle_focus()
     except apitypes.InspectorError as e:
         raise cmdutils.CommandError(e)
+
+
+@cmdutils.register(name='Ni!')
+def knights_who_say_ni() -> None:
+    """We are the Knights Who Say... 'Ni'!"""  # noqa: D400
+    raise cmdutils.CommandError("Do you demand a shrubbery?")
diff --git a/scripts/dev/src2asciidoc.py b/scripts/dev/src2asciidoc.py
index 4f05f98ca..6f6f0b1a8 100755
--- a/scripts/dev/src2asciidoc.py
+++ b/scripts/dev/src2asciidoc.py
@@ -375,7 +375,7 @@ def generate_commands(filename):
         other_cmds = []
         debug_cmds = []
         for name, cmd in objects.commands.items():
-            if cmd.deprecated:
+            if cmd.deprecated or name == 'Ni!':
                 continue
             if usertypes.KeyMode.normal not in cmd.modes:
                 other_cmds.append((name, cmd))