input question: Fix spacing: Besidesstirringmessagesandexhortationsatthemeetings,wealsoheardmanypersonaltestimoniesfrombrothersandsistersfrommanycountries.

output answer: Besides stirring messages and exhortations at the meetings, we also heard many personal testimonies from brothers and sisters from many countries.
Problem: ThecompanyisthereforeveryaffectedbythediscussionsonuseofPVC.ColoplasthasconsequentlydonesomeworkonsubstitutingPVCwithothertypesofplastic,buthasfoundthatitscustomers'attitudesvary.
What's a sentence that uses these characters?
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The company is therefore very affected by the discussions on use of PVC. Coloplast has consequently done some work on substituting PVC with other types of plastic, but has found that its customers' attitudes vary.
Add spaces: Lumenvaluesuppliedlightsource(lm):2900

Answer: Lumen value supplied light source (lm): 2900
Coccidioidomycosissetsinfrom7to20daysafterexposure,thoughsomedogscandevelopimmunityandnevershowanysymptoms,especiallyyoungerdogs.

Coccidioidomycosis sets in from 7 to 20 days after exposure, though some dogs can develop immunity and never show any symptoms, especially younger dogs.
[Q]: [HeartthrobVest-CrochetDROPSvestwithv-neck,buttonsatthefrontandpocketedgesin"Alpaca".]
[A]: [Heartthrob Vest - Crochet DROPS vest with v-neck, buttons at the front and pocket edges in "Alpaca".]
Problem: Add spaces: WeshouldalsonotethatJeans'paperwaswrittenaftertheMichelson-Morleyexperimentdisprovedtheexistenceoftheether,andinthesameyearthatEinsteinpublishedthespecialtheoryofrelativity.

Spaces added:
We should also note that Jeans' paper was written after the Michelson-Morley experiment disproved the existence of the ether, and in the same year that Einstein published the special theory of relativity.