globbing only adds not yet added inputs

README.md

@@ -199,7 +199,7 @@ Since there are quite some terms, an explanation of what they represent in __spr
 - __sheet__: a collection of _sprites_ which should be arranged on one or more _slices_, while obeying the defined constraints. Each _sprite_ is part of a single sheet (there is a default sheet _"spright"_).
 - __slice__: a single layer of a _sheet_ where the _sprites_ are arranged.
 - __sprite__: a rectangle on a _slice_ with additional metadata.
-- __pivot point__: the coordinate of a point on a _sprite_ used for placing it in the game.
+- __pivot point__: the coordinate of a point on a _sprite_ used for placing it in the game (a.k.a _anchor_).
 - __input__: a filename or sequence referring to one or more input images.
 - __source__: a single image file of an _input_ containing the pixel data of one or more _sprites_.
 - __output__: a filename or sequence referring to one or more output images.
@@ -483,7 +483,7 @@ Arch Linux users can install an up to date build from the [AUR](https://aur.arch
 Pre-built packages can be downloaded from the [latest release](https://github.com/houmain/spright/releases/latest) page. 
 
 Most conveniently but possibly not always the very latest version can be installed using a package manager:
-```
+```bash
 # install using winget
 winget install spright
 

src/InputParser.cpp

@@ -460,12 +460,13 @@ void InputParser::deduce_globbed_inputs(State& state) {
  return sequences;
  }();
 
+ const auto inputs_in_sheet_before = m_inputs.size();
  for (const auto& sequence : sequences) {
  if (has_map_suffix(sequence, state.map_suffixes))
  continue;
 
- // add only not yet encountered inputs
- if (last_n_contain(m_inputs, m_inputs_in_current_glob,
+ // only add inputs not encountered before
+ if (last_n_contain(m_inputs, inputs_in_sheet_before,
  [&](const Input& input) {
  return input.source_filenames == sequence.sequence_filename();
  }))