update default value of option 'wrap'

after/ftplugin/markdown.vim

@@ -1,6 +1,8 @@
 set concealcursor=c
 set synmaxcol=3000  " For long Chinese paragraphs
 
+set wrap
+
 " Fix minor issue with footnote, see https://github.com/vim-pandoc/vim-markdownfootnotes/issues/22
 if exists(':FootnoteNumber')
   nnoremap <buffer><silent> ^^ :<C-U>call markdownfootnotes#VimFootnotes('i')<CR>

after/ftplugin/tex.vim

@@ -1 +1,3 @@
 set textwidth=79
+
+set wrap