Fix formatting?

This might help, I hope so...

docs/courier-to-mailman3.md

@@ -42,3 +42,6 @@ This is our current version trying to communicate between courier and mailman3.
 * OK, let's see if what I need is in the headers...
 * Using the "To" header...  Let's see if that gets us anywhere.
 * It's not finding it.
+* Oh man `To` vs `'To'`
+* Progress...  But getting, "line too long" this seems like I need the 
+  replace that I had before.

source/courier-to-mailman3.py

@@ -46,7 +46,7 @@ try:
         # "Line too long (see RFC5321 4.5.3.1.6)"
         # https://gitlab.com/mailman/mailman/-/issues/1133
         content = sys.stdin.buffer.read()
-        #content = content.replace(b'\r\n', b'\n').replace(b'\r', b'\n').replace(b'\n', b'\r\n')
+        content = content.replace(b'\r\n', b'\n').replace(b'\r', b'\n').replace(b'\n', b'\r\n')
         header = content.strip()
         headers = dict(HeaderParser().parsestr(header.decode('utf-8')))
         header_to = headers['To']