build(deps): bump gcovr from 8.4 to 8.6

[dependabot]

Bumps gcovr from 8.4 to 8.6.

Release notes

Sourced from gcovr's releases.

8.6

Breaking changes:

• Drop support for Python 3.9. (#1227)

New features and notable changes:

• Add support for Python 3.14. (#1227)

Bug fixes and small improvements:

• To avoid merge errors, add the line number to the name of the unknown function. (#1229)
• If intermediate files are kept, rename the gcov files before processing them to log the final filename. (#1230)
• Use the first line after a function definition and not the first line which is hit. (#1231)

8.5

Breaking changes:

• The option --lcov-test-name doesn't accept values with spaces anymore. (#1196)
• The option --lcov-format-1.x is deprecated and mapped to --lcov-format-version=1.x. (#1212)
• Changes to HTML templates:
  • The file overview table in the default theme now uses a grid layout. (#1216)
  • The function lists table in both themes are changed to a grid layout. (#1216)
  • Add a common template folder where the common templates for the themes are stored. It contains the function content and source page navigation templates. (#1216)
  • Restructure the the summary and move some data to the footer. (#1217)
  • Add sorting by clicking on the headers of the file overview table and the function table. (#1219)
  • Add common stylesheet for all themes. (#1220)
  • Add navigation links to source details. (#1220)
  • Add buttons to toggle line background color in source details view. (#1221)
  • Add a document overview with all active lines in source details view. (#1222)
  • Added --html-static-report and remove argument from --html-single-page. (#1224)

New features and notable changes:

• Due to added support for LLVM source based code coverage format some configuration file keys got changed. The old gcov named options are still supported but they also affect the LLVM toolchain. (#1188)

  • gcov-exclude-directory is changed to exclude-directory.
  • keep-gcov-files is changed to keep-intermediate-files.
  • delete-gcov-files is changed to delete-input-files.

Bug fixes and small improvements:

• Fix coveralls report if there are several coverage elements per line. (#1165)
• Fix not excluded conditions if branches are excluded by comments. (#1171)
• Fix reported excluded branches in LCOV report. (#1171)
• Fix exclusion filter --gcov-exclude. (#1176)

... (truncated)

Changelog

Sourced from gcovr's changelog.

8.6 (13 January 2026)

Breaking changes:

• Drop support for Python 3.9. (:issue:1227)

New features and notable changes:

• Add support for Python 3.14. (:issue:1227)

Bug fixes and small improvements:

• To avoid merge errors, add the line number to the name of the unknown function. (:issue:1229)
• If intermediate files are kept, rename the gcov files before processing them to log the final filename. (:issue:1230)
• Use the first line after a function definition and not the first line which is hit. (:issue:1231)

.. _release_8_5:

8.5 (08 January 2026)

Known bugs:

• :ref:fix_1229
• :ref:fix_1231

Breaking changes:

• The option :option:--lcov-test-name doesn't accept values with spaces anymore. (:issue:1196)

• The option :option:--lcov-format-1.x <--lcov-format-1> is deprecated and mapped to :option:--lcov-format-version=1.x. (:issue:1212)

• Changes to HTML templates:

  • The file overview table in the default theme now uses a grid layout. (:issue:1216)
  • The function lists table in both themes are changed to a grid layout. (:issue:1216)
  • Add a common template folder where the common templates for the themes are stored. It contains the function content and source page navigation templates. (:issue:1216)
  • Restructure the the summary and move some data to the footer. (:issue:1217)
  • Add sorting by clicking on the headers of the file overview table and the function table. (:issue:1219)
  • Add common stylesheet for all themes. (:issue:1220)
  • Add navigation links to source details. (:issue:1220)
  • Add buttons to toggle line background color in source details view. (:issue:1221)
  • Add a document overview with all active lines in source details view. (:issue:1222)
  • Added :option:--html-static-report and remove argument from :option:--html-single-page. (:issue:1224)

New features and notable changes:

• Due to added support for LLVM source based code coverage format some configuration file keys got changed. The old gcov named options are still supported but they also affect the

... (truncated)

Commits

• e01ad73 Release 8.6 (#1232)
• aefc4ad Fix possible wrong line number for function (#1231)
• 9916edc Rename files before processing them (#1230)
• 190462c Avoid merge errors for lines of unknown functions (#1229)
• 083420c Fix bump_version.py if header in python script is missing
• 5d3ec01 Update supported python versions (#1227)
• a29f06e Prepare next iteration (#1226)
• 71eedb8 Release 8.5 (#1225)
• d67d90c Add option for static HTML report (#1224)
• 36fce2a Ensure coverage for function line in LCOV report (#1212)
• Additional commits viewable in compare view

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[github-actions]

Package	Line Rate	Branch Rate	Health
include.pagerank	100%	35%	✔
src	100%	52%	✔
src.json2mat	99%	61%	✔
src.pagerank	100%	61%	✔
tests	100%	39%	✔
Summary	100% (319 / 320)	47% (577 / 1239)	✔