[FEATURE] fix behaviour of flags_without_count option

[arl]

What we need is to let the possibility for the user to do all combinations, by being clever with the use of the flags_without_count option.

Remember that the default for flags_without_count is false

Everything is listed below and should be converted to test cases.

case 1 (non-empty symbol)

Symbol=S Count=1

• flags_without_count: false
  prints: "S1"

• flags_without_count: true
  prints: "S"

case 2 (empty symbol)

Symbol= Count=1

• flags_without_count: false
  prints: "1"

• flags_without_count: true
  prints: ""

case 3 (count is 0)

This remains unchanged and doesn't depend on the value of the flags_without_count option

Always prints ""

@copilot

Modify tests so that they show both behaviour for this flag (true and false)

As always document the new option, in the README and in the default configuration file