Enable Style/IndentAssignment Rubocop style cop

See #17478

.rubocop.yml

@@ -286,7 +286,7 @@ Style/IdenticalConditionalBranches:
 # Checks the indentation of the first line of the right-hand-side of a
 # multi-line assignment.
 Style/IndentAssignment:
-  Enabled: false
+  Enabled: true
 
 # Keep indentation straight.
 Style/IndentationConsistency:

lib/api/licenses.rb

@@ -2,15 +2,15 @@ module API
   # Licenses API
   class Licenses < Grape::API
     PROJECT_TEMPLATE_REGEX =
-    /[\<\{\[]
-      (project|description|
-      one\sline\s.+\swhat\sit\sdoes\.) # matching the start and end is enough here
-    [\>\}\]]/xi.freeze
+      /[\<\{\[]
+        (project|description|
+        one\sline\s.+\swhat\sit\sdoes\.) # matching the start and end is enough here
+      [\>\}\]]/xi.freeze
     YEAR_TEMPLATE_REGEX = /[<{\[](year|yyyy)[>}\]]/i.freeze
     FULLNAME_TEMPLATE_REGEX =
-    /[\<\{\[]
-      (fullname|name\sof\s(author|copyright\sowner))
-    [\>\}\]]/xi.freeze
+      /[\<\{\[]
+        (fullname|name\sof\s(author|copyright\sowner))
+      [\>\}\]]/xi.freeze
 
     # Get the list of the available license templates
     #