Add pre-commit, fix trailing whitespace

.pre-commit-config.yaml

@@ -0,0 +1,26 @@
+repos:
+  - repo: https://github.com/pycqa/flake8
+    rev: 7.3.0
+    hooks:
+      - id: flake8
+        args: ["--select=F"]
+        types: [python]
+
+  - repo: https://github.com/psf/black-pre-commit-mirror
+    rev: 25.11.0
+    hooks:
+      - id: black
+        language_version: python3
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+
+  - repo: https://github.com/PyCQA/bandit
+    rev: 1.9.2
+    hooks:
+    - id: bandit
+      files: ^bouquin/
+      args: ["-s", "B110"]

bouquin/fonts/DejaVu.license

@@ -74,7 +74,7 @@ Fonts, only if the fonts are renamed to names not containing either
 the words "Tavmjong Bah" or the word "Arev".
 
 This License becomes null and void to the extent applicable to Fonts
-or Font Software that has been modified and is distributed under the 
+or Font Software that has been modified and is distributed under the
 "Tavmjong Bah Arev" names.
 
 The Font Software may be sold as part of a larger software package but

bouquin/fonts/Noto.license

@@ -18,7 +18,7 @@ with others.
 
 The OFL allows the licensed fonts to be used, studied, modified and
 redistributed freely as long as they are not sold by themselves. The
-fonts, including any derivative works, can be bundled, embedded, 
+fonts, including any derivative works, can be bundled, embedded,
 redistributed and/or sold with any software provided that any reserved
 names are not used by derivative works. The fonts and derivatives,
 however, cannot be released under any other type of license. The

bouquin/locales/en.json

@@ -172,7 +172,7 @@
     "stats_metric_revisions": "Revisions",
     "stats_metric_documents": "Documents",
     "stats_total_documents": "Total documents",
-    "stats_date_most_documents": "Date with most documents",    
+    "stats_date_most_documents": "Date with most documents",
     "stats_no_data": "No statistics available yet.",
     "stats_time_total_hours": "Total hours logged",
     "stats_time_day_most_hours": "Day with most hours logged",
@@ -377,7 +377,7 @@
     "documents_missing_file": "The file does not exist:\n{path}",
     "documents_confirm_delete": "Remove this document from the project?\n(The file on disk will not be deleted.)",
     "documents_search_label": "Search",
-    "documents_search_placeholder": "Type to search documents (all projects)",    
+    "documents_search_placeholder": "Type to search documents (all projects)",
     "todays_documents": "Documents from this day",
     "todays_documents_none": "No documents yet.",
     "manage_invoices": "Manage Invoices",

tests/test_markdown_editor.py

@@ -1574,7 +1574,7 @@ def test_markdown_highlighter_special_characters(qtbot, app):
     highlighter = MarkdownHighlighter(doc, theme_manager)
 
     text = """
-Special chars: < > & " ' 
+Special chars: < > & " '
 Escaped: \\* \\_ \\`
 Unicode: 你好 café résumé
 """