Fix some issues reported by lintian

Fix some issues reported by lintian

• Trim trailing whitespace. (trailing-whitespace)

• Use secure copyright file specification URI. (insecure-copyright-format-uri)

• Bump debhelper from deprecated 9 to 13. (package-uses-deprecated-debhelper-compat-version)

• Set debhelper-compat version in Build-Depends. (uses-debhelper-compat-file)

• Update Vcs-* headers from URL redirect. (vcs-obsolete-in-debian-infrastructure)

• Use canonical URL in Vcs-Git. (vcs-field-not-canonical)

This merge proposal was created automatically by the Janitor bot. For more information, including instructions on how to disable these merge proposals, see https://janitor.debian.net/lintian-fixes.

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The bot will automatically update the merge proposal to resolve merge conflicts or close the merge proposal when all changes are applied through other means (e.g. cherry-picks). Updates may take several hours to propagate.

Build and test logs for this branch can be found at https://janitor.debian.net/lintian-fixes/pkg/lacheck/856e5200-d376-4e29-8e3e-503620751025.

Debdiff

These changes affect the binary packages:

[The following lists of changes regard files as different if they have different names, permissions or owners.]

Files in second set of .debs but not in first

-rw-r--r--  root/root   /usr/lib/debug/.build-id/35/384baea11b1474759119fcd1593a4df8568967.debug

Files in first set of .debs but not in second

-rw-r--r--  root/root   /usr/lib/debug/.build-id/31/62fb9487eaba754a28af89c34958b8da54156f.debug

No differences were encountered between the control files of package **lacheck**

Control files of package lacheck-dbgsym: lines which differ (wdiff format)

• Build-Ids: 3162fb9487eaba754a28af89c34958b8da54156f 35384baea11b1474759119fcd1593a4df8568967

You can also view the diffoscope diff (unfiltered).