Fix this off-by-one error

.coveragerc

@@ -0,0 +1,23 @@
+[run]
+source = PyPDF2
+branch = True
+
+[report]
+# Regexes for lines to exclude from consideration
+exclude_lines =
+    # Have to re-enable the standard pragma
+    pragma: no cover
+    @overload
+
+    # Don't complain about missing debug-only code:
+    def __repr__
+    def __str__
+    if self\.debug
+
+    # Don't complain if tests don't hit defensive assertion code:
+    raise AssertionError
+    raise NotImplementedError
+
+    # Don't complain if non-runnable code isn't run:
+    if 0:
+    if __name__ == .__main__.:

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,35 @@
+---
+name: Report a bug
+about: Something broke!
+title: ""
+labels: Bug
+assignees: MartinThoma
+
+---
+
+Replace this: What happened? What were you trying to achieve?
+
+## Environment
+
+Which environment were you using when you encountered the problem?
+
+```python
+$ python -m platform 
+# TODO: Your output goes here
+
+$ python -c "import PyPDF2;print(PyPDF2.__version__)"
+# TODO: Your output goes here
+```
+
+## Code
+
+This is a minimal, complete example that shows the issue:
+
+```python
+# TODO: Your code goes here
+```
+
+## PDF
+
+Share here the PDF file(s) that cause the issue. The smaller they are, the
+better. Let us know if we may add them to our tests!

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,20 @@
+---
+name: Request a Feature
+about: What do you think is missing in PyPDF2?
+title: ""
+labels: Feature Request
+assignees: MartinThoma
+---
+
+## Explanation
+
+Explain briefly what you want to achive.
+
+## Code Example
+
+How would your feature be used? (Remove this if it is not applicable.)
+
+```python
+from PyPDF2 import PdfFileReader, PdfFileWriter
+...  # your new feature in action!
+```

.github/workflows/github-ci.yaml

@@ -0,0 +1,98 @@
+# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
+# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+
+name: CI
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  tests:
+    name: pytest on ${{ matrix.python-version }}
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python-version: ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10"]
+
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v3
+    - name: Setup Python
+      uses: actions/setup-python@v3
+      with:
+        python-version: ${{ matrix.python-version }}
+    - name: Upgrade pip
+      run: |
+        python -m pip install --upgrade pip
+    - name: Install requirements (Python 3)
+      if: matrix.python-version != '2.7'
+      run: |
+        pip install -r requirements/ci.txt
+    - name: Install requirements (Python 2)
+      if: matrix.python-version == '2.7'
+      run: |
+        pip install pillow pytest coverage
+    - name: Install PyPDF2
+      run: |
+        pip install .
+    - name: Test with flake8
+      run: |
+        flake8 . --ignore=E203,W503,W504,E,F403,F405 --exclude build
+      if: matrix.python-version != '2.7'
+    - name: Test with pytest
+      run: |
+        python -m coverage run --parallel-mode -m pytest Tests -vv
+    - name: Upload coverage data
+      uses: actions/upload-artifact@v3
+      with:
+        name: coverage-data
+        path: .coverage.*
+        if-no-files-found: ignore
+
+  package:
+    name: Build & verify package
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+        with:
+          python-version: ${{env.PYTHON_LATEST}}
+
+      - run: python -m pip install build twine check-wheel-contents
+      - run: python -m build --sdist --wheel .
+      - run: ls -l dist
+      - run: check-wheel-contents dist/*.whl
+      - name: Check long_description
+        run: python -m twine check dist/*
+
+  coverage:
+    name: Combine & check coverage.
+    runs-on: ubuntu-latest
+    needs: tests
+
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v3
+        with:
+          # Use latest Python, so it understands all syntax.
+          python-version: ${{env.PYTHON_LATEST}}
+
+      - run: python -m pip install --upgrade coverage[toml]
+
+      - uses: actions/download-artifact@v3
+        with:
+          name: coverage-data
+
+      - name: Combine coverage & create xml report
+        run: |
+          python -m coverage combine
+          python -m coverage xml
+      - name: Upload Coverage to Codecov
+        uses: codecov/codecov-action@v2
+        with:
+          token: ${{ secrets.CODECOV_TOKEN }}
+          files: ./coverage.xml

.gitignore

@@ -1,6 +1,29 @@
 *.pyc
 *.swp
 .DS_Store
+.tox
 build
 .idea/*
+*.egg-info/
+dist/*
 
+#
+.mutmut-cache
+mutmut-results.*
+
+# Code coverage artifacts
+.coverage*
+coverage.xml
+
+# Editors / IDEs
+.vscode/
+
+# Docs
+docs/_build/
+
+# Files generated by some of the scripts
+dont_commit_merged.pdf
+dont_commit_writer.pdf
+PyPDF2-output.pdf
+Image9.png
+PyPDF2_pdfLocation.txt

.pre-commit-config.yaml

@@ -0,0 +1,39 @@
+# pre-commit run --all-files
+repos:
+-   repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.2.0
+    hooks:
+    -   id: check-ast
+    -   id: check-byte-order-marker
+    -   id: check-case-conflict
+    -   id: check-docstring-first
+    -   id: check-yaml
+    -   id: debug-statements
+    -   id: end-of-file-fixer
+    -   id: trailing-whitespace
+    -   id: mixed-line-ending
+    -   id: check-added-large-files
+        args: ['--maxkb=1000']
+-   repo: https://gitlab.com/pycqa/flake8
+    rev: 3.9.2
+    hooks:
+    -   id: flake8
+        args: ["--ignore", "E,W,F"]
+# -   repo: https://github.com/pre-commit/mirrors-mypy
+#     rev: v0.942
+#     hooks:
+#     -   id: mypy
+# -   repo: https://github.com/psf/black
+#     rev: 22.3.0
+#     hooks:
+#     -   id: black
+# -   repo: https://github.com/asottile/pyupgrade
+#     rev: v2.31.1
+#     hooks:
+#     -   id: pyupgrade
+#         args: [--py36-plus]
+-   repo: https://github.com/asottile/blacken-docs
+    rev: v1.12.1
+    hooks:
+    -   id: blacken-docs
+        additional_dependencies: [black==22.1.0]

.python-version

@@ -0,0 +1 @@
+3.6.15