: 1742639203:0;echo some tricky corner cases:
: 1742639224:0;echo two-line command \\
line 2
: 1742639255:0;echo three-line-command \\
line 2\\
line 3 ends with a backslash\\ 
: 1742639288:0;echo \ *
: 1742639331:0;echo this line ends with three backslashes \\\\
line 2
: 1742639341:0;echo backslash followed by a _single_ space \  
: 1742639405:0;echo \\
: 1111111111:0;echo this looks like a command, but it is a second line
: 1742639433:0;echo