Function: ebut:key-src-set-buffer
ebut:key-src-set-buffer is a function alias for
hbut:key-src-set-buffer, defined in hbut.el.
Signature
(ebut:key-src-set-buffer SRC)
Documentation
Temporarily set current buffer to SRC, a buffer, buffer name, or file.
If SRC is a directory, simply return it; otherwise, return set current buffer to SRC and return it or return nil if SRC is invalid/unreadable.