[Demonstration 1]

[Buggy Method]
public double getStdDev() {
    return getStdDev(iper, rake, stdDevType);
}

[Buggy Hunk]
return getStdDev(iper, rake, stdDevType);

[Patch]
return getStdDev(iper, mag, stdDevType);

[Demonstration 2]

[Buggy Method]
private String writeToFile(String data, String filename, Context context) throws IOException {
    File path = context.getFilesDir();
    File file = new File(path, filename);
    if (!file.exists() || !file.delete()) {
        throw new IOException("Failed to delete old file");
    }
    if (!file.createNewFile()) {
        throw new IOException("Failed to create file");
    }
    FileOutputStream stream = new FileOutputStream(file);
    try {
        stream.write(data.getBytes());
    } finally {
        stream.close();
    }
    return file.getPath();
}

[Buggy Hunk]
if (!file.exists() || !file.delete()) {

[Patch]
if ((file.exists() && !file.delete())) {

[Demonstration 3]

[Buggy Method]
public static void moveFiles(@NotNull Path temp, @NotNull Path outputDir) throws IOException {
    File[] files = temp.toFile().listFiles();
    if (files != null && 0 < files.length) {
        for (File file : files) {
            if (file.isDirectory()) {
                moveFiles(file.toPath(), outputDir.resolve(outputDir.resolve(file.getName())));
            } else {
                File outputFile = outputDir.resolve(file.getName()).toFile();
                if (outputFile.exists()) {
                    retryUntilTrue(outputFile::delete, outputFile.getAbsolutePath() + " delete");
                } else {
                    retryUntilTrue(new File(outputFile.getParent())::mkdirs, outputFile.getParent() + " mkdirs");
                }
                retryUntilTrue(file::renameTo, outputFile, file.getAbsolutePath() + " renameTo");
            }
        }
    }
}

[Buggy Hunk]
} else {

[Patch]
} else if (!outputFile.getParentFile().exists()) {