Add help doc

doc/editorconfig.txt

@@ -0,0 +1,52 @@
+*editorconfig.txt*  EditorConfig plugin for Neovim
+
+Author:  Gregory Anders <[email protected]>
+Repo:    https://github.com/gpanders/editorconfig.nvim
+License: GPL-3.0-or-later
+
+INTRODUCTION                                                    *editorconfig*
+
+editorconfig.nvim is an EditorConfig plugin for Neovim that automatically
+finds and parses .editorconfig files and applies its settings to each buffer.
+
+The following properties are supported:
+
+                                                        *editorconfig_charset*
+charset                 One of "utf-8", "utf-8-bom", "latin1", "utf-16be", or
+                        "utf-16le". Sets the 'fileencoding' and 'bomb'
+                        options.
+
+                                                    *editorconfig_end_of_line*
+end_of_line             One of "lf", "crlf", or "cr". These correspond to
+                        setting 'fileformat' to "unix", "dos", or "mac",
+                        respectively.
+
+                                                   *editorconfig_indent_style*
+indent_style            One of "tab" or "space". Sets the 'expandtab' option.
+
+                                                    *editorconfig_indent_size*
+indent_size             A number indicating the size of a single indent.
+                        Alternatively, use the value "tab" to use the value of
+                        the tab_width property. Sets the 'shiftwidth' and
+                        'softtabstop'.
+
+                                           *editorconfig_insert_final_newline*
+insert_final_newline    "true" or "false" to ensure the file always has a
+                        trailing newline as its last byte. Sets the
+                        'fixendofline' and 'endofline' options.
+
+                                                *editorconfig_max_line_length*
+max_line_length         A number indicating the maximum length of a single
+                        line. Sets the 'textwidth' option.
+
+                                                      *editorconfig_tab_width*
+tab_width               The display size of a single tab character. Sets the
+                        'tabstop' option.
+
+                                       *editorconfig_trim_trailing_whitespace*
+trim_trailing_whitespace
+                        When "true", trailing whitespace is automatically
+                        removed when the buffer is written.
+
+
+ vim:tw=78:ts=8:noet:ft=help:norl: