Support for tex-fmt (#5127)

* Support for tex-fmt

Support for tex-fmt, https://github.com/WGUNDERWOOD/tex-fmt.

* Remove file type plaintex

Remove file type plaintex as tex-fmt is solely for LaTeX.
See
https://superuser.com/questions/208177/vim-and-tex-filetypes-plaintex-vs-tex
for a distinction.

autoload/ale/fix/registry.vim

@@ -777,6 +777,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['markdown'],
 \       'description': 'Fix markdown files with rumdl.',
 \   },
+\   'tex-fmt': {
+\       'function': 'ale#fixers#tex_fmt#Fix',
+\       'suggested_filetypes': ['bib', 'tex'],
+\       'description': 'Fix LaTeX and bibliography files with tex-fmt.',
+\   }
 \}
 
 " Reset the function registry to the default entries.

autoload/ale/fixers/tex_fmt.vim

@@ -0,0 +1,20 @@
+" Author: https://github.com/Spixmaster
+" Description: Fix LaTeX and bibliography files with tex-fmt.
+
+call ale#Set('tex_tex_fmt_executable', 'tex-fmt')
+call ale#Set('tex_tex_fmt_use_global', get(g:, 'ale_use_global_executables', 0))
+call ale#Set('tex_tex_fmt_options', '')
+
+function! ale#fixers#tex_fmt#Fix(buffer) abort
+    let l:executable = ale#python#FindExecutable(
+    \   a:buffer,
+    \   'tex_tex_fmt',
+    \   ['tex-fmt']
+    \)
+
+    let l:options = ale#Var(a:buffer, 'tex_tex_fmt_options')
+
+    return {
+    \   'command': ale#Escape(l:executable) . ' ' . l:options . ' -s',
+    \}
+endfunction