Merge dev to master for 5.1 release#350

Merged

daobrien merged 35 commits intomasterfrom

Feb 6, 2022

Commits on Nov 3, 2021

Mostly clean-up to deal with book title changes, etc.
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Commits on Nov 24, 2021

Commits on Dec 9, 2021

#285 Minor punctuation fix (#314)

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Julian Cable
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Commits on Dec 16, 2021

Bogus change to test commits. (#320)
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Commits on Dec 21, 2021

#291 Diagram labels as sentence case only. (#321)
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Commits on Jan 5, 2022

Commits on Jan 6, 2022

#303 Added allowed use of 'unset' (#334)
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Commits on Jan 11, 2022

Jcable/297 Change of standard for punctuation with quotation marks. (#315)

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Julian Cable
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Commits on Jan 12, 2022

#309 GUI elements wording change (#332)
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Commits on Jan 13, 2022

Commits on Jan 14, 2022

Jcable/330 punc quot (#336)
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Commits on Jan 19, 2022

337 Add guidance about referring to UI elements and other publication titles (#338)
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Commits on Jan 21, 2022

339 Added information for IBM Style online (#340)
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Commits on Jan 24, 2022

298 Update 'backend' (#341)
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Commits on Feb 2, 2022

287 Add release notes (#343)
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Commits on Feb 3, 2022

344 Update chapter 4 ID
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Commits on Feb 4, 2022

Commits on Feb 6, 2022