Refs #9570 5 out of 12 complete

SaveANSTOAscii, SaveReflTBL, SaveILLCosmosAscii, WeightedMean and PoissonErrors have been checked and usage examples added.
Refs #9570 Added example headings

Examples now have headings
Refs #9570 Added SPE format

The SPE page now has details on its format
Refs #9570 Changed fixed width formatting

LoadLog now has a usage example

Most text which needs to be fixed width is now in code blocks. Those remaining using the double backtick (``) style are supposed to be like that as they're supposed to be inline
Refs #9570 SaveAsciiv2 now has usage examples

SaveAsciiv2 has three usage examples. The algorithm file itself got an edit to make a property description better.

Various formatting tidy-up
Refs #9570 Binary Opperation algorithms done

Plus, Minus, Divide and Multiply posed a problem as they all used a template. This has been ported across and they've each had usage examples added.

Fixed a problem with the SaveAscii Doctest
Merge remote-tracking branch 'origin' into feature/9570_Check_docs_and_usage_examples
Refs #9570 Wrong file added, fixing usage test

Fixing usage example by adding the right file this time. Removing the wrong file.
Refs #9570 fixed susbstitution

a susbstitution didn't work due to a typo, fixed
Merge remote-tracking branch 'origin/feature/9570_Check_docs_and_usage_examples'