Support lua.

Author: Andrew Ferrier

ftplugin/lua.vim

@@ -0,0 +1,9 @@
+function! s:DebugStringFunBase(desc, var)
+    let l:debug_str = 'print("' . a:desc . '" .. ' . a:var . ')'
+    return l:debug_str
+endfunc
+
+command! -buffer -nargs=0 AddDebugString
+            \ put=s:DebugStringFunBase(g:DebugstringPrefixStr(), g:debugStringCounter)
+command! -buffer -nargs=1 AddDebugStringExpr
+            \ put=s:DebugStringFunBase(<args> . ': ', <args>)