diff --git a/mu4e/mu4e-headers.el b/mu4e/mu4e-headers.el
index 1d6c50e0..e331d041 100644
--- a/mu4e/mu4e-headers.el
+++ b/mu4e/mu4e-headers.el
@@ -1073,7 +1073,7 @@ stack size."
 	(future (setq mu4e~headers-query-future stack))))))
 
 (defun mu4e~headers-pop-query (whence)
-    "Pop a query from the stack.
+  "Pop a query from the stack.
 WHENCE is a symbol telling us where to get it from; it's a
 symbol, either 'future or 'past."
   (case whence
@@ -1136,7 +1136,8 @@ the search."
 
 (defun mu4e-headers-search-narrow (filter )
   "Narrow the last search by appending search expression FILTER to
-the last search expression."
+the last search expression. Note that you can go back to previous
+query (effectively, 'widen' it), with `mu4e-headers-query-prev'."
   (interactive
     (let ((filter
   	    (read-string (mu4e-format "Narrow down to: ")
diff --git a/mu4e/mu4e-mark.el b/mu4e/mu4e-mark.el
index 957a6c6d..f9c93d56 100644
--- a/mu4e/mu4e-mark.el
+++ b/mu4e/mu4e-mark.el
@@ -1,4 +1,4 @@
-;;; mu4e-mark.el -- part of mu4e, the mu mail user agent
+;; mu4e-mark.el -- part of mu4e, the mu mail user agent
 ;;
 ;; Copyright (C) 2011-2012 Dirk-Jan C. Binnema
 
diff --git a/mu4e/mu4e-utils.el b/mu4e/mu4e-utils.el
index 7211e820..74bf4648 100644
--- a/mu4e/mu4e-utils.el
+++ b/mu4e/mu4e-utils.el
@@ -161,7 +161,7 @@ an absolute path."
 
 (defun mu4e-message (frm &rest args)
   "Like `message', but prefixed with mu4e.
-If we're waiting for user-input, don't show anyhting."
+If we're waiting for user-input, don't show anything."
   (unless (active-minibuffer-window)
     (message "%s" (apply 'mu4e-format frm args))
     nil))