Update git-blame background to be same as the cursorline bg

Author: Rakshit Sinha

lua/rakshit/plugins/git-blame.lua

@@ -6,15 +6,20 @@ return {
   -- The plugin wil only load once one of the keys is used.
   -- If you want to load the plugin at startup, add something like event = "VeryLazy",
   -- or lazy = false. One of both options will work.
-  opts = {
-    -- your configuration comes here
-    -- for example
-    enabled = true, -- if you want to enable the plugin
-    message_template = " <author> • <date> • <summary> • <<sha>>", -- template for the blame message, check the Message template section for more options
-    date_format = "%b-%d-%Y", -- template for the date, check Date format section for more options
-    virtual_text_column = 80, -- virtual text start column, check Start virtual text at column section for more options
-    message_when_not_committed = "Not committed yet",
-    display_virtual_text = 1,
-    highlight_group = "Question",
-  },
+  opts = function()
+    local hl_cursor_line = vim.api.nvim_get_hl(0, { name = "CursorLine" })
+    local hl_comment = vim.api.nvim_get_hl(0, { name = "Comment" })
+    local hl_combined = vim.tbl_extend("force", hl_comment, { bg = hl_cursor_line.bg })
+    vim.api.nvim_set_hl(0, "CursorLineBlame", hl_combined)
+    return {
+      enabled = true,
+      highlight_group = "CursorLineBlame",
+      message_template = " <author> • <date> • <summary> • <<sha>>", -- template for the blame message, check the Message template section for more options
+      date_format = "%b-%d-%Y", -- template for the date, check Date format section for more options
+      virtual_text_column = 80, -- virtual text start column, check Start virtual text at column section for more options
+      message_when_not_committed = "Not committed yet",
+      display_virtual_text = 1,
+      -- highlight_group = "Question",
+    }
+  end,
 }