vim: change the keyword list into a list

Just represent the list of keywords as a visible list.  This makes it easier to
see the individual keywords as well as makes it easy to add new keywords in the
future.

Author: compnerd

utils/vim/syntax/swift.vim

@@ -12,8 +12,39 @@ syn keyword swiftImport import skipwhite nextgroup=swiftImportModule
 syn match swiftImportModule /\<[A-Za-z_][A-Za-z_0-9]*\>/ contained nextgroup=swiftImportComponent
 syn match swiftImportComponent /\.\<[A-Za-z_][A-Za-z_0-9]*\>/ contained nextgroup=swiftImportComponent
 
-syn keyword swiftKeyword break case continue default do else for guard if in static switch repeat return where while public internal private mutating nonmutating var let typealias protocol extension
-syn keyword swiftKeyword associatedtype override required convenience final defer
+syn keyword swiftKeyword
+      \ break
+      \ case
+      \ continue
+      \ default
+      \ do
+      \ else
+      \ for
+      \ guard
+      \ if
+      \ in
+      \ static
+      \ switch
+      \ repeat
+      \ return
+      \ where
+      \ while
+      \ public
+      \ internal
+      \ private
+      \ mutating
+      \ nonmutating
+      \ var
+      \ let
+      \ typealias
+      \ protocol
+      \ extension
+      \ associatedtype
+      \ override
+      \ required
+      \ convenience
+      \ final
+      \ defer
 
 syn keyword swiftTypeDefinition class extension protocol struct typealias enum skipwhite nextgroup=swiftTypeName
 syn region swiftTypeAttributes start="\[" end="\]" skipwhite contained nextgroup=swiftTypeName