A macro pre-processor with embedded perl capability

Changes for 2.12 - 2023-05-11

• Bug Fixes
• #69 Can't call method "start_line_nr" on an undefined value Thank you @demerphq
• #68 Failed test at t/fix_046.t line 17 Thank you @demerphq
• #67 Can't locate Algorithm/Diff.pm in @INC