&optional avoid-current
extra-test-inclusive
extra-test-exclusive)
- "Test if BUFFER is a `next-error' capable buffer.
-
-If AVOID-CURRENT is non-nil, treat the current buffer
-as an absolute last resort only.
-
-The function EXTRA-TEST-INCLUSIVE, if non-nil, is called in each buffer
-that normally would not qualify. If it returns t, the buffer
-in question is treated as usable.
-
-The function EXTRA-TEST-EXCLUSIVE, if non-nil, is called in each buffer
-that would normally be considered usable. If it returns nil,
-that buffer is rejected."
+ "Return non-nil if BUFFER is a `next-error' capable buffer.
+If AVOID-CURRENT is non-nil, and BUFFER is the current buffer,
+return nil.
+
+The function EXTRA-TEST-INCLUSIVE, if non-nil, is called if
+BUFFER would not normally qualify. If it returns non-nil, BUFFER
+is considered `next-error' capable, anyway, and the function
+returns non-nil.
+
+The function EXTRA-TEST-EXCLUSIVE, if non-nil, is called if the
+buffer would normally qualify. If it returns nil, BUFFER is
+rejected, and the function returns nil."
(and (buffer-name buffer) ;First make sure it's live.
(not (and avoid-current (eq buffer (current-buffer))))
(with-current-buffer buffer