Add one to size of line.

To account for newline characters in the original document

services/document-updater/app/coffee/HttpController.coffee

@@ -33,7 +33,7 @@ module.exports = HttpController =
 	_getTotalSizeOfLines: (lines) ->
 		size = 0
 		for line in lines
-			size += line.length
+			size += (line.length + 1)
 		return size
 
 	setDoc: (req, res, next = (error) ->) ->

services/document-updater/test/unit/coffee/HttpController/setDocTests.coffee

@@ -70,7 +70,7 @@ describe "HttpController.setDoc", ->
 	describe "when the payload is too large", ->
 		beforeEach ->
 			lines = []
-			for _ in [0..300000]
+			for _ in [0..200000]
 				lines.push "test test test"
 			@req.body.lines = lines
 			@DocumentManager.setDocWithLock = sinon.stub().callsArgWith(5)