Use default max_lines when calling up & down
          #1094
        
          
      
                
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Description
Both
upanddownonly show 1 source line when called, I think it would be more useful if they provided more context. This removes themax_lines: 1kwarg when they callshow_src.max_linesinshow_srcwill default toCONFIG[:show_src_lines]1.Big thanks to @st0012 for showing me and @bquorning where this behavior is defined.
Footnotes
(https://github.com/ruby/debug/blob/0b77e8294b5b220b3b2a089bf09f94808654899a/lib/debug/thread_client.rb#L510) ↩