No space required after WIP identifier

Modified changelog

CHANGELOG

@@ -2,6 +2,7 @@ Please view this file on the master branch, on stable branches it's out of date.
 
 v 8.3.0 (unreleased)
   - Fix: Assignee selector is empty when 'Unassigned' is selected (Jose Corcuera)
+  - WIP identifier on merge requests no longer requires trailing space
 
 v 8.2.0
   - Improved performance of finding projects and groups in various places

app/models/merge_request.rb

@@ -239,7 +239,7 @@ class MergeRequest < ActiveRecord::Base
   end
 
   def work_in_progress?
-    !!(title =~ /\A\[?WIP\]?:? /i)
+    !!(title =~ /\A\[?WIP(\]|:| )/i)
   end
 
   def mergeable?

spec/models/merge_request_spec.rb

@@ -162,6 +162,21 @@ describe MergeRequest do
       expect(subject).to be_work_in_progress
     end
 
+    it "detects the 'WIP' prefix" do
+      subject.title = "WIP#{subject.title}"
+      expect(subject).to be_work_in_progress
+    end
+
+    it "detects the 'WIP:' prefix" do
+      subject.title = "WIP:#{subject.title}"
+      expect(subject).to be_work_in_progress
+    end
+
+    it "detects the '[WIP]' prefix" do
+      subject.title = "[WIP]#{subject.title}"
+      expect(subject).to be_work_in_progress
+    end
+
     it "doesn't detect WIP for words starting with WIP" do
       subject.title = "Wipwap #{subject.title}"
       expect(subject).not_to be_work_in_progress