Describe the bug

Missing some changed lines when using UnifiedDiffReader.parseUnifiedDiff

To Reproduce
Steps to reproduce the behavior:

1. Example data
2. simple programm snippet
3. See error

when debug this test, I found that patch of file f2 is empty, but in line 11 of problem_diff_issue51.diff is a changed line, right?

And the file1.getFromFile()).isEqualTo("f1"); should be old/f1 right? same as new/f1, old/f2, new/f2 in the diff file.

Expected behavior
A clear and concise description of what you expected to happen.

System

• Java version 1.8
• Version

<groupId>io.github.java-diff-utils</groupId>
<artifactId>java-diff-utils</artifactId>
<version>4.5</version>