Use the --stdin-filename option for textlint, so configuration files will be discovered better

autoload/ale/handlers/textlint.vim

@@ -14,13 +14,11 @@ endfunction
 
 function! ale#handlers#textlint#GetCommand(buffer) abort
     let l:executable = ale#handlers#textlint#GetExecutable(a:buffer)
-    let l:config = ale#path#FindNearestFile(a:buffer, '.textlintrc')
     let l:options = ale#Var(a:buffer, 'textlint_options')
 
     return ale#node#Executable(a:buffer, l:executable)
     \    . (!empty(l:options) ? ' ' . l:options : '')
-    \    . (!empty(l:config) ? ' -c ' . ale#Escape(l:config) : '')
-    \    . ' -f json %t'
+    \    . ' -f json --stdin --stdin-filename %s'
 endfunction
 
 function! ale#handlers#textlint#HandleTextlintOutput(buffer, lines) abort

test/command_callback/test_textlint_command_callbacks.vader

@@ -36,13 +36,13 @@ Execute(The executable should be configurable):
 
 Execute(The executable should be used in the command):
   AssertEqual
-  \ ale#Escape('textlint') . ' -f json %t',
+  \ ale#Escape('textlint') . ' -f json --stdin --stdin-filename %s',
   \ ale#handlers#textlint#GetCommand(bufnr(''))
 
   let b:ale_textlint_executable = 'foobar'
 
   AssertEqual
-  \ ale#Escape('foobar') . ' -f json %t',
+  \ ale#Escape('foobar') . ' -f json --stdin --stdin-filename %s',
   \ ale#handlers#textlint#GetCommand(bufnr(''))
   \
 
@@ -50,7 +50,7 @@ Execute(The options should be configurable):
   let b:ale_textlint_options = '--something'
 
   AssertEqual
-  \ ale#Escape('textlint') . ' --something -f json %t',
+  \ ale#Escape('textlint') . ' --something -f json --stdin --stdin-filename %s',
   \ ale#handlers#textlint#GetCommand(bufnr(''))
 
 Execute(The local executable from .bin should be used if available):
@@ -61,7 +61,8 @@ Execute(The local executable from .bin should be used if available):
   \ ale#handlers#textlint#GetExecutable(bufnr(''))
 
   AssertEqual
-  \ ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_bin_path/node_modules/.bin/textlint')) . ' -f json %t',
+  \ ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_bin_path/node_modules/.bin/textlint'))
+  \   . ' -f json --stdin --stdin-filename %s',
   \ ale#handlers#textlint#GetCommand(bufnr(''))
 
 Execute(The local executable from textlint/bin should be used if available):
@@ -73,19 +74,12 @@ Execute(The local executable from textlint/bin should be used if available):
 
   if has('win32')
     AssertEqual
-    \ ale#Escape('node.exe') . ' ' . ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_textlint_bin_path/node_modules/textlint/bin/textlint.js')) . ' -f json %t',
+    \ ale#Escape('node.exe') . ' ' . ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_textlint_bin_path/node_modules/textlint/bin/textlint.js'))
+    \   . ' -f json --stdin --stdin-filename %s',
     \ ale#handlers#textlint#GetCommand(bufnr(''))
   else
     AssertEqual
-    \ ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_textlint_bin_path/node_modules/textlint/bin/textlint.js')) . ' -f json %t',
+    \ ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_textlint_bin_path/node_modules/textlint/bin/textlint.js'))
+    \   . ' -f json --stdin --stdin-filename %s',
     \ ale#handlers#textlint#GetCommand(bufnr(''))
   endif
-
-Execute(Configuration files should be discovered):
-  call ale#test#SetFilename('textlint_paths/with_config_path/foo.txt')
-
-  AssertEqual
-  \ ale#Escape('textlint')
-  \   . ' -c ' . ale#Escape(ale#path#Simplify(g:dir . '/textlint_paths/with_config_path/.textlintrc'))
-  \   . ' -f json %t',
-  \ ale#handlers#textlint#GetCommand(bufnr(''))