Improve indent for ...

indent/python.vim

@@ -1,7 +1,7 @@
 " Vim indent file
 " Language:    Python
 " Author:      Akinori Hattori <hattya@gmail.com>
-" Last Change: 2022-09-27
+" Last Change: 2023-05-21
 " License:     MIT License
 
 if exists('b:did_indent')
@@ -33,6 +33,7 @@ let s:compound_stmts = {
 \  '^\s*\<finally\>': '\v^\s*<%(try|except|else)>',
 \}
 let s:dedent = '\v^\s*<%(pass|return|raise|break|continue)>'
+let s:ellipsis = '\v^\s*\.{3}\.@!'
 let s:lcont = '\\$'
 let s:syn_skip = '\v\c%(Comment|Quotes|String)$'
 let s:syn_str = '\v\c%(Quotes|String)$'
@@ -134,6 +135,9 @@ function! GetPEP8PythonIndent() abort
   elseif ll =~# s:dedent
     " simple statement
     let ind -= shiftwidth()
+  elseif ll =~# s:ellipsis
+    " ellipsis
+    let ind -= shiftwidth()
   elseif getline(v:lnum - 1) =~# s:lcont
     " line continuation
     if s:is_compound_stmt(ll)

test/indent.vimspec

@@ -341,6 +341,20 @@ Describe filetype indent
       \]
       Assert Equals(Insert(in), Buffer(out))
     End
+
+    It decreases the indent level after ellipsis
+      let in  = "def spam():\<CR>...\<CR>"
+      let in .= "def eggs():\<CR>....\<CR>"
+      let in .= "def ham():"
+      let out = [
+      \  'def spam():',
+      \  '    ...',
+      \  'def eggs():',
+      \  '    ....',
+      \  '    def ham():',
+      \]
+      Assert Equals(Insert(in), Buffer(out))
+    End
   End
 
   Describe if statement