use macval() instead of manual escaping

[kbjarkefur]

Instead of manually escaping strings and using capture without handling _rc, I suggest we are using this: get_command, word(`"`macval(line)'"'). The code in this PR works on all the examples added related to this issues in test file "${tf}/target-1.do".

If this does not solve all cases, lets add those cases to the test file.

[bbdaniels]

See #47 for an alternative solution to this -- this similarly does not handle unmatched quotes as in:

* Bad comment "

repkit/src/ado/reprun.ado

Lines 283 to 302 in ef67764

	// Sanitize that string! -- see d17586d873a978987f34ba2fe536a311107ea58b for more regex
	local theline = `"`macval(line)'"'
	while regexm(`"`macval(theline)'"',"[\*]") {
	local theline = regexr(`"`macval(theline)'"',"[\*]","")
	}
	while regexm(`"`macval(theline)'"',"\[//]"){
	local theline = regexr(`"`macval(theline)'"',"\[//]","")
	}
	// Identify all commands in line
	foreach w in `macval(theline)' {
	cap get_command, word(`"`w'"')
	if `doflag' == 1 local dofile = "`w'"
	if "`r(command)'" == "do" | "`r(command)'" == "run" {
	local doflag = 1
	}
	else local doflag 0
	local line_command = "`line_command' `r(command)'"
	}
	local line_command : list uniq line_command