Cpp update clang

[sven-oly]

Fixing a number of warnings in CPP

[gemini-code-assist]

Summary of Changes

Hello @sven-oly, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request aims to improve code hygiene by addressing minor formatting issues in C++ files. The changes involve adding newlines, which may resolve specific compiler warnings and contribute to better code readability.

Highlights

• Code Formatting: Minor formatting adjustments were made by adding newlines in C++ source files, potentially resolving specific compiler warnings related to whitespace or structure.

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[gemini-code-assist]

Code Review

This pull request introduces minor stylistic changes by adding blank lines in two C++ files, reportedly to fix warnings. While adding a blank line in coll.cpp is a reasonable stylistic choice, the change in datetime_fmt.cpp results in two consecutive blank lines, which is generally discouraged as it can reduce code readability. I have provided a suggestion to correct this.