GitLab

	* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
	Add Guile regexpses.

	* etc/compilation.txt (file): Add Guile backtrace example.

	* test/automated/compile-tests.el (compile--test-error-line):
	Grok FILE being nil.  Allows for Guile tests to pass.
	(compile-tests--test-regexps-data): Add Guile tests.