Misc flow fixes

* Fixed typeof in return statements
* Fixed some double `skipwhite` statements
* Fixes pangloss#1159

Author: amadeus

extras/flow.vim

@@ -6,7 +6,7 @@ syntax region  jsFlowExactObject    contained matchgroup=jsFlowNoise start=/{|/
 syntax region  jsFlowParens         contained matchgroup=jsFlowNoise start=/(/  end=/)/ contains=@jsFlowCluster keepend fold
 syntax match   jsFlowNoise          contained /[:;,<>]/
 syntax keyword jsFlowType           contained boolean number string null void any mixed JSON array Function object array bool class
-syntax keyword jsFlowTypeof         contained typeof skipempty skipempty nextgroup=jsFlowTypeCustom,jsFlowType
+syntax keyword jsFlowTypeof         contained typeof skipempty skipwhite nextgroup=jsFlowTypeCustom,jsFlowType
 syntax match   jsFlowTypeCustom     contained /[0-9a-zA-Z_.]*/ skipwhite skipempty nextgroup=jsFlowGroup
 syntax region  jsFlowGroup          contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster
 syntax region  jsFlowArrowArguments contained matchgroup=jsFlowNoise start=/(/  end=/)\%(\s*=>\)\@=/ oneline skipwhite skipempty nextgroup=jsFlowArrow contains=@jsFlowCluster
@@ -26,6 +26,7 @@ syntax match   jsFlowReturnMaybe    contained /?/ skipwhite skipempty nextgroup=
 syntax region  jsFlowReturnGroup    contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncBlock,jsFlowReturnOrOp
 syntax match   jsFlowReturnOrOp     contained /\s*|\s*/ skipwhite skipempty nextgroup=@jsFlowReturnCluster
 syntax match   jsFlowWildcardReturn contained /*/ skipwhite skipempty nextgroup=jsFuncBlock
+syntax keyword jsFlowTypeofReturn   contained typeof skipempty skipwhite nextgroup=@jsFlowReturnCluster
 
 syntax region  jsFlowFunctionGroup      contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsFuncArgs
 syntax region  jsFlowClassGroup         contained matchgroup=jsFlowNoise start=/</ end=/>/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsClassBlock
@@ -41,8 +42,8 @@ syntax keyword jsFlowDeclare                  declare skipwhite skipempty nextgr
 syntax match   jsFlowClassProperty  contained /\<[0-9a-zA-Z_$]*\>:\@=/ skipwhite skipempty nextgroup=jsFlowClassDef containedin=jsClassBlock
 syntax region  jsFlowClassDef       contained start=/:/    end=/\%(\s*[,=;)\n]\)\@=/ contains=@jsFlowCluster skipwhite skipempty nextgroup=jsClassValue
 
-syntax region  jsFlowModule         contained start=/module/ end=/{\@=/ skipempty skipempty nextgroup=jsFlowDeclareBlock contains=jsString
-syntax region  jsFlowInterface      contained start=/interface/ end=/{\@=/ skipempty skipempty nextgroup=jsFlowInterfaceBlock contains=@jsFlowCluster
+syntax region  jsFlowModule         contained start=/module/ end=/{\@=/ skipempty skipwhite nextgroup=jsFlowDeclareBlock contains=jsString
+syntax region  jsFlowInterface      contained start=/interface/ end=/{\@=/ skipempty skipwhite nextgroup=jsFlowInterfaceBlock contains=@jsFlowCluster
 syntax region  jsFlowDeclareBlock   contained matchgroup=jsFlowNoise start=/{/ end=/}/ contains=jsFlowDeclare,jsFlowNoise fold
 
 " NOTE: It appears the nextgroup was causing a ton of breakages... testing it
@@ -53,7 +54,7 @@ syntax region  jsFlowInterfaceBlock contained matchgroup=jsFlowNoise start=/{/ e
 
 syntax region  jsFlowParenAnnotation contained start=/:/ end=/[,=)]\@=/ containedin=jsParen contains=@jsFlowCluster
 
-syntax cluster jsFlowReturnCluster            contains=jsFlowNoise,jsFlowReturnObject,jsFlowReturnArray,jsFlowReturnKeyword,jsFlowReturnGroup,jsFlowReturnMaybe,jsFlowReturnOrOp,jsFlowWildcardReturn,jsFlowReturnArrow
+syntax cluster jsFlowReturnCluster            contains=jsFlowNoise,jsFlowReturnObject,jsFlowReturnArray,jsFlowReturnKeyword,jsFlowReturnGroup,jsFlowReturnMaybe,jsFlowReturnOrOp,jsFlowWildcardReturn,jsFlowReturnArrow,jsFlowTypeofReturn
 syntax cluster jsFlowCluster                  contains=jsFlowArray,jsFlowObject,jsFlowExactObject,jsFlowNoise,jsFlowTypeof,jsFlowType,jsFlowGroup,jsFlowArrowArguments,jsFlowMaybe,jsFlowParens,jsFlowOrOperator,jsFlowWildcard
 
 if version >= 508 || !exists("did_javascript_syn_inits")
@@ -69,6 +70,7 @@ if version >= 508 || !exists("did_javascript_syn_inits")
   HiLink jsFlowType               Type
   HiLink jsFlowTypeCustom         PreProc
   HiLink jsFlowTypeof             PreProc
+  HiLink jsFlowTypeofReturn       PreProc
   HiLink jsFlowArray              PreProc
   HiLink jsFlowObject             PreProc
   HiLink jsFlowExactObject        PreProc