feat: add gnuplot support (#209)

Author: sahashirshendu

lua/Comment/ft.lua

@@ -11,10 +11,11 @@ local A = vim.api
 local M = {
     cxx_l = '//%s',
     cxx_b = '/*%s*/',
-    hash = '#%s',
     dbl_hash = '##%s',
     dash = '--%s',
     dash_bracket = '--[[%s]]',
+    hash = '#%s',
+    hash_bracket = '#[[%s]]',
     haskell_b = '{-%s-}',
     fsharp_b = '(*%s*)',
     html = '<!--%s-->',
@@ -32,7 +33,7 @@ local L = {
     bib = { M.latex },
     c = { M.cxx_l, M.cxx_b },
     cabal = { M.dash },
-    cmake = { M.hash, '#[[%s]]' },
+    cmake = { M.hash, M.hash_bracket },
     conf = { M.hash },
     conkyrc = { M.dash, M.dash_bracket },
     cpp = { M.cxx_l, M.cxx_b },
@@ -52,6 +53,7 @@ local L = {
     gdscript = { M.hash },
     gleam = { M.cxx_l },
     glsl = { M.cxx_l, M.cxx_b },
+    gnuplot = { M.hash, M.hash_bracket },
     go = { M.cxx_l, M.cxx_b },
     graphql = { M.hash },
     groovy = { M.cxx_l, M.cxx_b },