Rollup merge of rust-lang#110086 - beetrees:max-line-length, r=jyn514

Add `max_line_length` to `.editorconfig`, matching rustfmt

Add `max_line_length` to `.editorconfig`, matching the max width used by rustfmt.

Author: JohnTitor

.editorconfig

@@ -11,6 +11,7 @@ trim_trailing_whitespace = true
 insert_final_newline = true
 indent_style = space
 indent_size = 4
+max_line_length = 100
 
 [*.md]
 # double whitespace at end of line