Breaks expandtab for Makefiles

[mirosval]

Does this bug happen when you install plugin without vim-polyglot?
AFAIK vim-polyglot does not have a plugin for Makefiles

Describe the bug:
When vim-polyglot is loaded, it sets expandtab on makefiles.

To Reproduce:

1. Have vim-polyglot in .vimrc
2. Open a makefile
3. Tab inserts spaces instead of tabs
4. Running :verbose set expandtab? shows this:

[mirosval]

So after some investigation, it seems that the makefile config relies on tabs already being in the file.
If I create a new file, initially there are neither spaces nor tabs, so it defaults to spaces.
But if the file already has tabs, then it works.

[jrudess]

Makefiles use both tabs and spaces. Setting expandtab for a make file make it impossible to write valid syntax. For now, it seems necessary to disable the autoindent feature of polyglot if you regularly edit makefiles.

https://stackoverflow.com/questions/28712585/when-to-use-space-or-tab-in-makefile

Recipes (the commands that run compilers, echo, etc.) are written in shell script syntax.

The rest of the makefile that is not in a recipe is written in makefile syntax.

In order for make to tell the difference between a recipe and things that are not a recipe, it uses TAB characters. So, lines that begin with TAB are assumed to be part of a recipe (so they are shell scripts and passed to the shell for parsing), and lines that do not begin with TAB cannot be part of a recipe (so they cannot be shell scripts: they must be make syntax).

[sheerun]

Weird, for me it defaults to tabs

[sheerun]

what is the output of :echo b:sleuth_culprit for you? what is the content of this file?