* lisp/progmodes/project.el (project-kill-buffer-conditions):
Fix typo.
The car can be one of the following:
* `major-mode': the buffer is killed if the buffer's major
mode is eq to the cons-cell's cdr
- * `defived-mode': the buffer is killed if the buffer's major
+ * `derived-mode': the buffer is killed if the buffer's major
mode is derived from the major mode denoted by the cons-cell's
cdr
* `not': the cdr is interpreted as a negation of a condition.