ACaptionIsConvertedToSrtFormat
ACaptionIsConvertedToSrtFormat
extract ConvertToSrt
extract CaptionToSrtConverter
rename CaptionSrtFileWriter
AListOfCaptionCanBeConverted
CaptionsAreLeftUntouchedWhenConverted
remove constant duplications
extract captions
simplify test
reuse stringBuilder
extract textWriter
small fixes
rename variable