Format progress as percentage (#55)

* Format progress as percentage

* Move parentheses in string.format

Author: disrupted

lua/lsp-status/statusline.lua

@@ -81,7 +81,7 @@ local function get_lsp_statusline(bufnr)
       contents = msg.title
       if msg.message then contents = contents .. ' ' .. msg.message end
 
-      if msg.percentage then contents = contents .. ' (' .. msg.percentage .. ')' end
+      if msg.percentage then contents = contents .. string.format(" (%.0f%%)", msg.percentage) end
 
       if msg.spinner then
         contents = config.spinner_frames[(msg.spinner % #config.spinner_frames) + 1] .. ' ' ..