Tighten gnu compile regexp further

* lisp/progmodes/compile.el (compilation-error-regexp-alist-alist):
The -fanalyzer ASCII art does not contain tabs.

lisp/progmodes/compile.el

@@ -347,9 +347,8 @@ of[ \t]+\"?\\([a-zA-Z]?:?[^\":\n]+\\)\"?:" 3 2 nil (1))
        ;; which is used for non-interactive programs other than
        ;; compilers (e.g. the "jade:" entry in compilation.txt).
        (? (| (: alpha (+ (in ?. ?- alnum)) ":" (? " "))
-             ;; Skip indentation generated by tools like GCC's
-             ;; -fanalyzer.
-             (: (+ (in " \t")) "|")))
+             ;; Skip indentation generated by GCC's -fanalyzer.
+             (: (+ " ") "|")))
 
        ;; File name group.
        (group-n 1