Partial fix for vim-better-whitespace issue

I had this plugin turned off (at least in terms of automatically
removing whitespace on save). Based on the following issue, it's now
working as long as I remove all whitespace instead of just on changed
lines. Not ideal, but I think it'll be good enough for now.

See:
ntpeters/vim-better-whitespace#160 (comment)

init.lua

@@ -55,9 +55,9 @@ vim.g.neoterm_default_mod = 'botright'
 vim.g.neoterm_size = 33
 vim.g.ruby_indent_assignment_style = 'variable'
 vim.g.better_whitespace_enabled=1
-vim.g.strip_only_modified_lines=1
 vim.g.strip_whitespace_confirm=0
-vim.g.strip_whitespace_on_save=0 -- This stopped working for some reason.
+vim.g.strip_whitespace_on_save=1
+vim.g.strip_only_modified_lines=0 --some bug with my `diff` command causes errors if this is set to 1
 vim.g['test#ruby#rspec#options'] = { all = '--format progress' }
 vim.g['test#strategy'] = 'neoterm'
 vim.o.autoread = true