Add section comments

Author: jfelchner

Diff for: syntax/javascript.vim

@@ -74,6 +74,7 @@ else
 endif
 syntax cluster jsRegexpSpecial    contains=jsSpecial,jsRegexpBoundary,jsRegexpBackRef,jsRegexpQuantifier,jsRegexpOr,jsRegexpMod
 
+" Objects
 syntax match   jsObjectKey         contained /\<[0-9a-zA-Z_$]*\>\(\s*:\)\@=/ contains=jsFunctionKey skipwhite skipempty nextgroup=jsObjectValue
 syntax match   jsObjectColon       contained /:/ skipwhite skipempty
 syntax region  jsObjectKeyString   contained start=+"+  skip=+\\\("\|$\)+  end=+"\|$+  contains=jsSpecial,@Spell skipwhite skipempty nextgroup=jsObjectValue
@@ -133,7 +134,7 @@ syntax keyword jsDomNodeConsts  ELEMENT_NODE ATTRIBUTE_NODE TEXT_NODE CDATA_SECT
 " HTML events and internal variables
 syntax keyword jsHtmlEvents     onblur onclick oncontextmenu ondblclick onfocus onkeydown onkeypress onkeyup onmousedown onmousemove onmouseout onmouseover onmouseup onresize
 
-"" Code blocks
+" Code blocks
 syntax region  jsBracket                      matchgroup=jsBrackets            start=/\[/ end=/\]/ contains=@jsExpression extend fold
 syntax region  jsParen                        matchgroup=jsParens              start=/(/  end=/)/  contains=@jsAll extend fold
 syntax region  jsParenIfElse        contained matchgroup=jsParensIfElse        start=/(/  end=/)/  contains=@jsAll skipwhite skipempty nextgroup=jsCommentMisc,jsIfElseBlock extend fold
@@ -171,6 +172,7 @@ syntax match   jsArrowFuncArgs  /([^()]*)\s*\(=>\)\@=/ contains=jsFuncArgs skipe
 exe 'syntax match jsFunction /\<function\>/ skipwhite skipempty nextgroup=jsGenerator,jsFuncName,jsFuncArgs skipwhite '.(exists('g:javascript_conceal_function')       ? 'conceal cchar='.g:javascript_conceal_function : '')
 exe 'syntax match jsArrowFunction /=>/      skipwhite skipempty nextgroup=jsFuncBlock contains=jsFuncBraces           '.(exists('g:javascript_conceal_arrow_function') ? 'conceal cchar='.g:javascript_conceal_arrow_function : '')
 
+" Classes
 syntax keyword jsClassKeywords          contained extends class
 syntax match   jsClassNoise             contained /\./
 syntax match   jsClassMethodType        contained /\%(get\|set\|static\|async\)\%( \k\+\)\@=/ skipwhite skipempty nextgroup=jsFuncName,jsClassProperty