Fix \InfoUpdater\GitHelper::restoreNonRectorChanges() to catch lines with close brackets

Problem/Motivation

\InfoUpdater\GitHelper::restoreNonRectorChanges() attempts to restore files that only have whitespace changes. Rector has(had?) a bug where it would make some changes that weren't in any rector rules.

This led to some files that had just whitespace or empty doc block changes. It was working but doesn't take into account lines that just have } and whitespace changes.

Proposed resolution

Fix the regex pattern and add test.

Remaining tasks