Changed

• #690: break without any arguments now sets a breakpoint on the current line, just like gdb (@sergioro9.

Fixed

• #741: Small consistency issues in help messages.
• #743: untracevar command crashing when giving a non existent global variable.
• #744: Another punctuation tweak in enable breakpoints help message.
• #736: Skip warning about $SAFE global variable on ruby 2.7 when listing global variables.

Added

• #847 and #850: Support for MRI 3.1, 3.2, and 3.3 (@marshall-lee).
• #688: where command now receives an optional numeric argument <n> to print the nth first frames (@sergioro9.

Removed

• Support for MRI 2.4, 2.5, 2.6, 2.7, and 3.0. Byebug no longer installs on this platform.