Examples
list // list N lines starting at current line
list +5 // list next 5 lines starting at current line
list - // list previous N lines
list -20 // list previous 20 lines
list 1000 // list line 1000
list 1000,$ // list from line 1000 to last line
list 2737 +24 // list line 2737 and next 24 lines
list 1000 -20 // list line 980 to 1000
list test.cc:33 // list source line 33 in file test.cc
list -w // list N lines around current line
list -w8 ”test.cc”func1 // list 8 lines around function func1
list -i 500 +10 // list source and assembly code for line
500 to line 510