Strip whitespace in title

[afandian]

e.g. https://bus.eventdata.crossref.org/events/07f510cc-bdc4-4bf4-9fd4-45deed551eeb

{
    updated-date: "2017-10-09T08:49:27.481Z",
    license: "https://creativecommons.org/publicdomain/zero/1.0/",
    terms: "https://doi.org/10.13003/CED-terms-of-use",
    updated: "edited",
    obj_id: "https://doi.org/10.1038/nenergy.2017.140",
    source_token: "c1bfb47c-39b8-4224-bb18-96edf85e3f7b",
    occurred_at: "2017-09-20T16:59:00Z",
    subj_id: "http://feedproxy.google.com/~r/thebreakthrough/~3/Kr57lBR2w1w/stuck-in-the-s-curve",
    updated-reason: "https://evidence.eventdata.crossref.org/announcements/2017-10-06T00-00-00Z-ED-12.json",
    id: "07f510cc-bdc4-4bf4-9fd4-45deed551eeb",
    evidence_record: "https://evidence.eventdata.crossref.org/evidence/20170927-newsfeed-06089f15-6968-48e7-b4bd-19867e0b668a",
    action: "add",
    subj: {
    pid: "http://feedproxy.google.com/~r/thebreakthrough/~3/Kr57lBR2w1w/stuck-in-the-s-curve",
    type: "post-weblog",
        title: "    
                               Stuck in the S-Curve?
           ",
        url: "http://feedproxy.google.com/~r/thebreakthrough/~3/Kr57lBR2w1w/stuck-in-the-s-curve"
    },
    source_id: "newsfeed",
    obj: {
        pid: "https://doi.org/10.1038/nenergy.2017.140",
        url: "https://www.nature.com/articles/nenergy2017140.epdf"
    },
    timestamp: "2017-09-27T00:25:24Z",
    relation_type_id: "discusses"
}