cut: Don't ignore empty fields

Author: https://github.com/tcl3
Commit: https://github.com/SerenityOS/serenity/commit/230a873e0e
Pull-request: https://github.com/SerenityOS/serenity/pull/19614

Userland/Utilities/cut.cpp

@@ -136,7 +136,7 @@ static void process_line_bytes(StringView line, Vector<Range> const& ranges)
 
 static void process_line_fields(StringView line, Vector<Range> const& ranges, char delimiter)
 {
-    auto string_split = DeprecatedString(line).split(delimiter);
+    auto string_split = DeprecatedString(line).split(delimiter, SplitBehavior::KeepEmpty);
     Vector<DeprecatedString> output_fields;
 
     for (auto& range : ranges) {