Improve completion for built-in interface names

The plugin now provides the name for the built-in interfaces as found in
the docs instead of a lowercased one.

autoload/phpcomplete.vim

@@ -921,7 +921,7 @@ function! phpcomplete#CompleteClassName(base, kinds, current_namespace, imports)
 		if index(kinds, 'i') != -1
 			let builtin_interfaces = filter(keys(copy(g:php_builtin_interfaces)), 'v:val =~? "^'.substitute(a:base, '\\', '', 'g').'"')
 			for interfacename in builtin_interfaces
-				call add(res, {'word': leading_slash.interfacename, 'kind': 'i', 'menu': ''})
+				call add(res, {'word': leading_slash.g:php_builtin_interfaces[interfacename]['name'], 'kind': 'i', 'menu': ''})
 			endfor
 		endif
 	endif

tests/CompleteClassName_test.vim

@@ -104,9 +104,8 @@ fun! TestCase_complete_classes_from_built_in_classes()
 
     " set up example built-in list
     let g:php_builtin_interfaces = {
-    \'Traversable': {
-    \   'methods': {
-    \   },
+    \'traversable': {
+    \   'name': 'Traversable'
     \ },
     \}
 
@@ -115,12 +114,23 @@ fun! TestCase_complete_classes_from_built_in_classes()
                 \ {'word': 'Traversable', 'menu': '', 'kind': 'i'}],
                 \ res)
 
-    " user typed \ and hits <c-x><c-o> in a file starting with "namespace NS1;"
+    " user typed \T and hits <c-x><c-o> in a file starting with "namespace NS1;"
     let res = phpcomplete#CompleteClassName('\T', ['i'], 'NS1', {})
     call VUAssertEquals([
                 \ {'word': '\Traversable', 'menu': '', 'kind': 'i'}],
                 \ res)
 
+    let g:php_builtin_interfaces = {
+    \'traversable': {
+    \   'name': 'FindMeFoo'
+    \ },
+    \}
+    " the completion should give the value of the 'name' property regardeless
+    " of the outer dictionary keys
+    let res = phpcomplete#CompleteClassName('tra', ['i'], '\', {})
+    call VUAssertEquals([
+                \ {'word': 'FindMeFoo', 'menu': '', 'kind': 'i'}],
+                \ res)
 
     silent! bw! %
 endf