main: Make using :edit term:// run TermOpen event

Ref #4306

src/nvim/main.c

@@ -317,7 +317,7 @@ int main(int argc, char **argv)
   }
 
   // open terminals when opening files that start with term://
-  do_cmdline_cmd("autocmd BufReadCmd term://* "
+  do_cmdline_cmd("autocmd BufReadCmd term://* nested "
                  ":call termopen( "
                  // Capture the command string
                  "matchstr(expand(\"<amatch>\"), "

test/functional/terminal/edit_spec.lua

@@ -0,0 +1,23 @@
+local helpers = require('test.functional.helpers')
+
+local nvim_dir = helpers.nvim_dir
+local command = helpers.command
+local meths = helpers.meths
+local clear = helpers.clear
+local eq = helpers.eq
+
+describe(':edit term://*', function()
+  before_each(function()
+    clear()
+    meths.set_option('shell', nvim_dir .. '/shell-test')
+  end)
+
+  it('runs TermOpen event', function()
+    meths.set_var('termopen_runs', {})
+    command('autocmd TermOpen * :call add(g:termopen_runs, expand("<amatch>"))')
+    command('edit term://')
+    termopen_runs = meths.get_var('termopen_runs')
+    eq(1, #termopen_runs)
+    eq(termopen_runs[1], termopen_runs[1]:match('^term://.//%d+:$'))
+  end)
+end)