vim-patch:7.4.631

Problem:    The default conceal character is documented to be a space but it's
            initially a dash. (Christian Brabandt)
Solution:   Make the intial value a space.

4a42710695

src/nvim/version.c

@@ -365,7 +365,7 @@ static int included_patches[] = {
   // 634,
   633,
   // 632 NA
-  // 631,
+  631,
   630,
   629,
   // 628,