lexers: sync with scintillua changeset 571 rev 23435f1d82da

This fixes ":set syntax text" and adds a missing file association
for the taskpaper lexer.

The protobuf and crystal lexers were slightly reformatted,
but should contain no functional changes.

1 files changed, 2 insertions, 3 deletions

diff --git a/lexers/lexer.lua b/lexers/lexer.lua
index bce9c29..5653bb2 100644
--- a/lexers/lexer.lua
+++ b/lexers/lexer.lua
@@ -1032,9 +1032,7 @@ function M.load(name, alt_name)
   -- prevent errors from occurring.
   if not M.property then
     M.property, M.property_int = {}, setmetatable({}, {
-      __index = function(t, k)
-        return tostring(tonumber(M.property[k]) or 0)
-      end,
+      __index = function(t, k) return tonumber(M.property[k]) or 0 end,
       __newindex = function() error('read-only property') end
     })
   end
@@ -1114,6 +1112,7 @@ end
 -- @return table of token names and positions.
 -- @name lex
 function M.lex(lexer, text, init_style)
+  if not lexer._GRAMMAR then return {M.DEFAULT, #text + 1} end
   if not lexer._LEXBYLINE then
     -- For multilang lexers, build a new grammar whose initial_rule is the
     -- current language.