PSL Strings are properly rendered

# PSL Strings are properly rendered
print("Hello, World!");

# Escaped sequences are highlighted too
print("Goodbye \H\H\H\H\H\H\H\HHello, World!\n");

# Multi-line strings are supported
print("multi
line");

a = 1;
b = 2.5;
c = 0xff;

p = nthargf(process(".*"), 1, " \t", "\n");
lock("test");
execute("OS", "pwd");

foreach entry (["aaa", "bbb", "ccc"]) {
	if (grep("[bc]", entry)) {
		last;
	}
}

set("/CLASS/inst/paramA/state", WARN);
if (true) {
	PslDebug = -1;
}
output = execute("OS", "echo test");
if (errno) {
	print(ALARM." with errno=".errno."\n");
}
print(trim(output, "\n\r\t ", TRIM_LEADING_AND_TRAILING));