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[PATCH 2/2] ___arguments: New completion function for __arguments.

The new function, ___arguments, would not be called by _default by
default, nor by _nothing, nor by nothing, but by _normal — at least,
if the normal _normal _setup setup is used.

___arguments could also have completed __arguments by calling _arguments
without arguments, but then nothing would have printed the "no argument or
option" message that _nothing prints.

I assume the decision to have ___arguments as a separate file, rather
than simply add something to _nothing or have __arguments complete its
own (__arguments') arguments by changing its first line from "#compdef
_arguments" to "#compdef _arguments __arguments", may be somewhat
controversial.  However, while there are good arguments both for having
__arguments completed by __arguments and for having __arguments
completed by ___arguments, let us please have no long arguments about
whether __arguments should be completed by __arguments or by
___arguments.  My argument is that a complex argument about whether
__arguments or ___arguments should complete __arguments' arguments would
take time and tuits away from reviewing the arguments to the _arguments
calls in __arguments' completion of the arguments to _arguments; that
is: from reviewing the arguments to __arguments' _arguments _arguments'
arguments completion calls.

Review-by: Matthew Martin
Thanks-to: comm -12 /usr/share/dict/words =(() { print -o -raC1 -- ${${@:t}#_} } Completion/{Base,Zsh}/**/_*(N) | uniq)
 Completion/Zsh/Function/___arguments | 11 +++++++++++
 Completion/Zsh/Function/__arguments  |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)
 create mode 100644 Completion/Zsh/Function/___arguments

diff --git a/Completion/Zsh/Function/___arguments b/Completion/Zsh/Function/___arguments
new file mode 100644
index 000000000..187ae644c
--- /dev/null
+++ b/Completion/Zsh/Function/___arguments
@@ -0,0 +1,11 @@
+#compdef __arguments ___arguments
+# Dear reader: This is the function ___arguments.  This function is the
+# completion function of the completion function of the completion utility
+# function _arguments.  If you're looking for the completion utility function
+# _arguments or for its completion function __arguments, whose completion
+# function is this function, then you've come to the wrong place.  See
+# ./__arguments for __arguments and for pointers to _arguments.
+# Unlike _arguments, __arguments and ___arguments take no arguments.
diff --git a/Completion/Zsh/Function/__arguments b/Completion/Zsh/Function/__arguments
index 40a4e4b60..444a1c809 100644
--- a/Completion/Zsh/Function/__arguments
+++ b/Completion/Zsh/Function/__arguments
@@ -16,7 +16,7 @@
 # source code, that'd be either in ../../../Completion/Base/Utility/_arguments
 # or in ./_arguments, depending on where you're reading this file.
-# __arguments takes no arguments.
+# __arguments takes no arguments, as ___arguments would tell you.
 if (( ${words[(i)--]} < CURRENT )); then
   # "Deriving spec forms from the help output"

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