[DOC release] Minor grammar error

Minor grammar error in RenderBuffer docs.
Merge pull request #5009 from chadhietala/patch-1

[DOC release] Minor grammar error
initial commit
michael, i think we need to not do the vendored require and build a mergetree ourselves that will use these new exports. needs to reference the entire tree in lodash/lib (see the lodash.js file's bottom export)