This is how I would analyze how Hurston's "Sweat" is a tribute to ordinary African Americans and a departure from some of the ideal of the Harlem Renaissance.
I read an excellent post on Medium comparing the punctuation use of multiple authors. It's cool! (no, seriously)
Phillis Wheatley was the first published African American woman, and in the poem "On Being Brought from African to America" she engages in a quiet, cultural rebellion with the use of a single comma.