Can't change pager to builtin pager

[karliss]

Work environment

Questions	Answers
OS/arch/bits (mandatory)	Arch Linux
File format of the file you reverse (mandatory)	ELF
Architecture/bits of the file (mandatory)	64
r2 -v full output, not truncated (mandatory)	radare2 4.5.0-git 26371 @ linux-x86-64 git.4.4.0-361-g0b2276e2b commit: 0b2276e build: 2020-07-01__19:53:30

Expected behavior

scr.pager can be set to '..' as suggested by help message.

Actual behavior

Trying to change pager to .. gets ignored. Tested both with new and old shell.

Steps to reproduce the behavior

[0x00005b20]> e? scr.pager
           scr.pager: System program (or '..') to use when output exceeds screen boundaries
[0x00005b20]> e scr.pager=foo
[0x00005b20]> e scr.pager
foo
[0x00005b20]> e scr.pager=..
[0x00005b20]> e scr.pager
foo

Additional Logs, screenshots, source-code, configuration dump, ...

[ret2libc]

In cmd_eval.c:

	case '.': // "e "
	case ' ': // "e "
		if (r_str_endswith (input, ".")) {
			r_config_list (core->config, input + 1, 0);
		} else {
			// XXX we cant do "e cmd.gprompt=dr=", because the '=' is a token, and quotes dont affect him
			r_config_eval (core->config, input + 1, false);
		}

the if (r_str_endswith ('.')) is done so if you do e cfg. you would get the list of all variables under cfg.. However, in this case it causes issues because it does not call r_config_eval to set the variable.