ast-merge v3.1.0 released!

3.1.0 - 2026-01-08

• TAG: v3.1.0
• COVERAGE: 96.89% – 2465/2544 lines in 47 files
• BRANCH COVERAGE: 89.62% – 794/886 branches in 47 files
• 98.75% documented

Added

• Ast::Merge::EmitterBase - Abstract base class for format-specific emitters
  • Provides common infrastructure for converting AST structures back to text
  • Tracks indentation level with configurable indent_size (default: 2 spaces)
  • Manages output lines collection with #lines accessor
  • #emit_blank_line - Emit an empty line
  • #emit_leading_comments - Emit comments from CommentTracker
  • #emit_raw_lines - Emit lines without modification (preserves exact formatting)
  • #to_s - Get output as a single string with trailing newline
  • #clear - Reset emitter state
  • #indent / #dedent - Increase/decrease indentation level
  • Subclass hooks: #initialize_subclass_state, #clear_subclass_state, #emit_tracked_comment
  • Used by jsonc-merge, json-merge, bash-merge, toml-merge, and psych-merge emitters

Changed

• tree_haver v4.0.0

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