Update signature_help.lua

Author: ranjithshegde

lua/completion/signature_help.lua

@@ -48,13 +48,13 @@ M.autoOpenSignatureHelp = function()
       local trimmed_lines_filetype = vim.lsp.util.try_trim_markdown_code_blocks(lines)
 	  local opts = {}
 	  if vim.g.completion_popup_border then
-		opts.border = vim.g.completion_popup_border
+	    opts.border = vim.g.completion_popup_border
 	  end
       local bufnr, _ = vim.lsp.util.open_floating_preview(
         -- TODO show popup when signatures is empty?
         vim.lsp.util.trim_empty_lines(lines),
         trimmed_lines_filetype,
-		opts
+	opts
       )
       -- setup a variable for floating window, fix #223
       vim.api.nvim_buf_set_var(bufnr, "lsp_floating", true)