clang-format: re-format for clang-18

clang-format-18 isn't compatible with the clang-format-17 output, so we
need to reformat the code with the latest version.  The way clang-18
handles lambda formatting also changed, so we have made changes to the
organization default style format to better handle lambda formatting.

See I5e08687e696dd240402a2780158664b7113def0e for updated style.
See Iea0776aaa7edd483fa395e23de25ebf5a6288f71 for clang-18 enablement.

Change-Id: Iceec1dc95b6c908ec6c21fb40093de9dd18bf11a
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/include/multipart_parser.hpp b/include/multipart_parser.hpp
index 9d55f3a..3c60995 100644
--- a/include/multipart_parser.hpp
+++ b/include/multipart_parser.hpp
@@ -270,8 +270,8 @@
                 {
                     const char* start = &buffer[partDataMark];
                     size_t size = i - partDataMark;
-                    mime_fields.rbegin()->content += std::string_view(start,
-                                                                      size);
+                    mime_fields.rbegin()->content +=
+                        std::string_view(start, size);
                 }
                 index++;
             }