Fix typos found across repository

Signed-off-by: Justas Brazauskas <brazauskasjustas@gmail.com>

filenotify/filenotify.go

@@ -1,6 +1,6 @@
 // Package filenotify provides a mechanism for watching file(s) for changes.
 // Generally leans on fsnotify, but provides a poll-based notifier which fsnotify does not support.
-// These are wrapped up in a common interface so that either can be used interchangably in your code.
+// These are wrapped up in a common interface so that either can be used interchangeably in your code.
 package filenotify
 
 import "gopkg.in/fsnotify.v1"

filenotify/poller.go

@@ -24,7 +24,7 @@ const watchWaitTime = 200 * time.Millisecond
 
 // filePoller is used to poll files for changes, especially in cases where fsnotify
 // can't be run (e.g. when inotify handles are exhausted)
-// filePoller satifies the FileWatcher interface
+// filePoller satisfies the FileWatcher interface
 type filePoller struct {
 	// watches is the list of files currently being polled, close the associated channel to stop the watch
 	watches map[string]chan struct{}