[nvim] fix: correctly shorten "_XXX" elements in statusline

.config/nvim/lua/statusline.lua

@@ -113,7 +113,11 @@ local function shorten_path(path, max_len)
         end
 
         local segment = segments[idx]
-        local shortened = segment:sub(1, vim.startswith(segment, '.') and 2 or 1)
+        local short_end = 1
+        if (vim.startswith(segment, '.') or vim.startswith(segment, '_')) then
+            short_end = 2
+        end
+        local shortened = segment:sub(1, short_end)
         segments[idx] = shortened
         len = len - (#segment - #shortened)
     end
@@ -211,7 +215,6 @@ local function statusline_focused()
             "%=",
             right
         }
-
 end
 
 local function statusline_not_focused()