re #15450

re #15289

and added some sentences in docs.

The converted text is stored in separate .rst files in the docs directory.
Refs #9562

by creating a common base class.
This should satisfy cpd, though not me yet.

Touches nearly everything unfortunately but is necessary.

and restored version 1

which supports an OutputWorkspace. ConjoinWorkspaces version 1.0 works as before

The spectrum numbers are only "fixed" if they don't not already
overlap.

4 tests fail at this point

When they don't overlap the spectrum numbers should just be copied from the
input workspaces and the second one continued on top.

Refs #3984 Took the wiki description from every algorithm's wiki page and placed it in a comment in the CPP file (instead of the header file).

When masked _bins_ are propagated from an input to an output workspace the y-values shouldn't be modified re #3382

Replace uses of the SpectraDetectorMap with the new interface. Note that mutableSpectraMap has now gone in favour of using MatrixWorkspace::replaceSpectraMap with a brand new implentation. Re #3067

Refs #2572: Added an initDocs() for all algorithms that sets the summary string to display in the dialog, as well as the wiki summary for possible later auto-wiki-fication of documentation.

Refs #2572: Ran into issue with un-escaped characters that my compiler did not catch. Commented out all optional messages until I can fix it.