editorconfig: line ending and indentation settings

.editorconfig

@@ -0,0 +1,22 @@
+# Copyright (C) James May, <[email protected]>, et al.
+# SPDX-License-Identifier: curl
+
+# EditorConfig: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+charset = utf-8
+spelling_language = en-US
+
+# Unix-style newlines
+end_of_line = lf
+
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{c,h}]
+indent_style = space
+indent_size = 2
+max_line_length = 79

tests/data/.editorconfig

@@ -0,0 +1,8 @@
+# Copyright (C) James May, <[email protected]>, et al.
+# SPDX-License-Identifier: curl
+
+# EditorConfig: https://EditorConfig.org
+
+# set as top-most EditorConfig with no configuration file 
+# to help prevent erroneous reformatting of test data
+root = true