Update markdown.snippets

Update gitcommit.snippets: add Co-authored-by snippet

fix: go: st and inf generated non-compilable code

Update Gleam for current Gleam

Start Gleam snippets with tab character

Update ruby.snippets: add binding.irb debug

Universal Verification Methodology (UVM) Snippets.

fix the escape issue with python 3.12.0

Add GTest support

Update vimsnippets.py to fix the escape char issue

chore(readme): note that snipmate contributions should be preferred

Update php.snippets

Update php.snippets

Scheme: remove redundant tab

add debugger to dart

Remove redundant empty line after #include snippets for C

add dart print and anonymous function snippets

Qualifying Range-v3 and C++20's <ranges> entities; ad-hoc snippet for…

TeX: remove spurious line breaks