diff --git a/.gitignore b/.gitignore
index 28213b67..6d1c1102 100644
--- a/.gitignore
+++ b/.gitignore
@@ -23,3 +23,9 @@ project.index
 ## Sublime
 sublime-*
 sftp-config.json
+
+# Operating systems
+## Mac OS X
+.DS_Store
+## Windows
+Thumbs.db
diff --git a/i18n/qqq.json b/i18n/qqq.json
index b216a7a1..0e250ad4 100644
--- a/i18n/qqq.json
+++ b/i18n/qqq.json
@@ -41,7 +41,7 @@
 	"gadgets-not-found": "Used as error message. Parameters:\n* $1 - gadget name",
 	"gadgets-export-text": "Used as page description in [[Special:Gadgets]].\n\nRefers to {{msg-mw|Gadgets-export-download}}.\n\nSee example: [[Special:Gadgets/export/editbuttons]]\n\nFollowed by the \"Export\" form.\n\nParameters:\n* $1 - gadget name\n* $2 - gadget definition (code)",
 	"gadgets-export-download": "Use the verb for this message. Submit button.\n{{Identical|Download}}",
-	"gadgets-validate-notset": "Error message shown if a a required property is not set. $1 is the name of the property, e.g. settings.rights .",
+	"gadgets-validate-notset": "Error message shown if a required property is not set. $1 is the name of the property, e.g. settings.rights .",
 	"gadgets-validate-wrongtype": "Error message shown if a property is set to the wrong type. * $1 is the name of the property, e.g. settings.rights or module.messages[3].\n* $2 is the type that this property is expected to have\n* $3 is the type it actually had",
 	"right-gadgets-edit": "{{doc-right|gadgets-edit}}",
 	"action-gadgets-edit": "{{doc-action|gadgets-edit}}",