···591591Approach #1 (add-on)
592592^^^^^^^^^^^^^^^^^^^^
593593594594-Install the Toggle Word Wrap add-on that is available from
595595-https://addons.mozilla.org/thunderbird/addon/toggle-word-wrap/
596596-It adds a menu entry "Enable Word Wrap" in the composer's "Options" menu
594594+Install the Toggle Line Wrap add-on that is available from
595595+https://addons.thunderbird.net/thunderbird/addon/toggle-line-wrap
596596+It adds a button "Line Wrap" to the composer's toolbar
597597that you can tick off. Now you can compose the message as you otherwise do
598598(cut + paste, 'git format-patch' | 'git imap-send', etc), but you have to
599599insert line breaks manually in any text that you type.
600600+601601+As a bonus feature, the add-on can detect patch text in the composer
602602+and warns when line wrapping has not yet been turned off.
603603+604604+The add-on requires a few tweaks of the advanced configuration
605605+(about:config). These are listed on the download page.
600606601607Approach #2 (configuration)
602608^^^^^^^^^^^^^^^^^^^^^^^^^^^