[chore]: Update syntax

Harmonizing the syntax files
Now inline comment are a single string instead of a table of strings.

-(language_c): Removed whitespaces breaking indent
-(language_html): Removed trailing whitespace

data/plugins/language_html.lua

@@ -3,7 +3,7 @@ local syntax = require "core.syntax"
 
 syntax.add {
   name = "HTML",
-  files = { "%.html?$" },  
+  files = { "%.html?$" },
   block_comment = { "<!--", "-->" },
   patterns = {
     {