nvim: after/plugin/lualine: Use simplified symbols

nvim/.config/nvim/after/plugin/lualine.lua

@@ -104,7 +104,7 @@ ins_left {
   'diff',
   source     = diffsigns_source,
   cond       = conditions.check_git_workspace,
-  symbols    = { added = ' ', modified = ' ', removed = ' ' },
+  symbols    = { added = '+', modified = '~', removed = '-' },
   diff_color = {
     added    = { fg = colors.green },
     modified = { fg = colors.orange },
@@ -116,7 +116,7 @@ ins_left {
 ins_left {
   'diagnostics',
   sources = { 'nvim_diagnostic' },
-  symbols = { error = ' ', warn = ' ', info = ' ', hint = ' ' },
+  symbols = { error = 'E:', warn = 'W:', info = 'I:', hint = 'H:' },
   diagnostics_color = {
     color_error = { fg = colors.red },
     color_warn  = { fg = colors.yellow },