Merge pull request #3636 from matrix-org/jryans/90-chars

Update code style for our 90 char life

code_style.md

@@ -22,7 +22,7 @@ number throgh from the original code to the final application.
 General Style
 -------------
 - 4 spaces to indent, for consistency with Matrix Python.
-- 120 columns per line, but try to keep JavaScript code around the 80 column mark.
+- 120 columns per line, but try to keep JavaScript code around the 90 column mark.
   Inline JSX in particular can be nicer with more columns per line.
 - No trailing whitespace at end of lines.
 - Don't indent empty lines.