An example .gitattributes file that will configure custom hunk header patterns for some common languages and file formats. See https://tekin.co.uk/2020/10/better-git-diff-output-for-ruby-python-elixir-and-more for more details.

.gitattributes

*.c     diff=cpp
*.h     diff=cpp
*.c++   diff=cpp
*.h++   diff=cpp
*.cpp   diff=cpp
*.hpp   diff=cpp
*.cc    diff=cpp
*.hh    diff=cpp
*.m     diff=objc
*.mm    diff=objc
*.cs    diff=csharp
*.css   diff=css
*.html  diff=html
*.xhtml diff=html
*.ex    diff=elixir
*.exs   diff=elixir
*.go    diff=golang
*.php   diff=php
*.pl    diff=perl
*.py    diff=python
*.md    diff=markdown
*.rb    diff=ruby
*.rake  diff=ruby
*.rs    diff=rust
*.lisp  diff=lisp
*.el    diff=lisp