message: Fix signedness matching on byte offset ranges.
  Addresses:
diff: @@ -32,13 +32,13 @@ ByteOffsetSet DisableFormattingRanges(absl::string_view text,
  const verible::TokenSequence& tokens) {
  static constexpr absl::string_view kTrigger = "verilog_format:";
  static const auto kDelimiters = absl::ByAnyChar(" \t");
  - static constexpr int kNullOffset = -1;
  + static constexpr size_t kNullOffset = static_cast<size_t>(-1);
  const verible::TokenInfo::Context context(
  text,
  [](std::ostream& stream, int e) { stream << verilog_symbol_name(e); });
  // By default, no text ranges are formatter-disabled.
  - int begin_disable_offset = kNullOffset;
  + size_t begin_disable_offset = kNullOffset;
  ByteOffsetSet disable_set;
  for (const auto& token : tokens) {
  VLOG(2) << verible::TokenWithContext{token, context};
  @@ -62,7 +62,7 @@ ByteOffsetSet DisableFormattingRanges(absl::string_view text,
  } // else ignore
  } else if (comment_tokens.front() == "on") {
  if (begin_disable_offset != kNullOffset) {
  - const int end_disable_offset = token.left(text);
  + const size_t end_disable_offset = token.left(text);
  if (begin_disable_offset != end_disable_offset) {
  disable_set.Add({begin_disable_offset, end_disable_offset});
  }
  