Trim trailing whitespace

Commands used to search and replace:

    $ git grep -Ilz '[[:blank:]]$' |
      xargs -0 -I '{}' sh -c "printf '%s\n' \"\$(sed -E \
        's/[[:blank:]]+$//' '{}')\" >'{}'"

This fixes all of the "trailing whitespace" errors raised by git:

    $ git diff --check 4b825dc642cb6eb9a060e54bf8d69288fbee4904..HEAD |
      grep '^[^+]' | cut -f 3 -d : | LC_ALL=C sort | uniq -c
         72  space before tab in indent.
          4  trailing whitespace.

1 files changed, 1 insertions, 1 deletions

diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index c8c6f40bd..53066013d 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -81,7 +81,7 @@ output goes here
 <details>
 <summary>Output of <code>LC_ALL=C firejail --debug /path/to/program</code></summary>
 <p>
-  
+
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