Add {{over-quotation}} to tags (style of writing)

Fixes #341

modules/friendlytag.js

@@ -477,6 +477,7 @@ Twinkle.tag.article.tags = {
 	"overcoverage": "article has an extensive bias or disproportional coverage towards one or more specific regions",
 	"overlinked": "article may have too many duplicate and/or irrelevant links",
 	"overly detailed": "article contains an excessive amount of intricate detail",
+	"over-quotation": "article contains too many or too-lengthy quotations for an encyclopedic entry",
 	"peacock": "article may contain peacock terms that promote the subject without adding information",
 	"plot": "plot summary in article is too long",
 	"POV": "article does not maintain a neutral point of view",
@@ -547,6 +548,7 @@ Twinkle.tag.article.tagCategories = {
 			"fansite",
 			"manual",
 			"news release",
+			"over-quotation",
 			"prose",
 			"technical",
 			"tense",