join-lines-smarter
A smarter, language-agnostic Join Lines command. https://atom.io/packages/join-lines-smarter
- Merge string literals - single or double quote,
+,., or nothing as concat operator - Merges line and docblock comments (supports
//,#,*, and;) - Removes trailing commas and omits spaces when merging onto a line with an opening or closing brace (
[],{},(), or<>)

TIP: use with split-string-on-enter and dockblockr to get the reverse; adding concatenation operators and leading comments when entering a new line.