Incorrect formating for some <= in Appendix D

[davidhassell]

Incorrect formating for some <= in Appendix D

Moderator

Requirement Summary

Asciidoctor turns a plain <= into an arrow, so these instances need protecting with \<=. For example, see http://cfconventions.org/Data/cf-conventions/cf-conventions-1.10/cf-conventions.html#_ocean_s_coordinate_generic_form_1.

There is a useful comment in appf.adoc relating to this:

// The following lines shows how to insert Unicode for <=.  A plain '<=' turns into an arrow.
// Except as marked, all work for asciidoctor and none work for asciidoctor-pdf.
//     **`-90.0 &#x2264; latitude_of_projection_origin &#x2264; 90.0`** +
//doesn't work for asciidoctor     **`-90.0 &#2264; latitude_of_projection_origin &#2264; 90.0`** +
//     **`-90.0 &le; latitude_of_projection_origin &le; 90.0`** +
//     **`-90.0 &leq; latitude_of_projection_origin &leq; 90.0`** +
//     **`-90.0 +++<u>&le;</u>+++ latitude_of_projection_origin +++<u>&le;</u>+++ 90.0`** +
//     **`-90.0 < = latitude_of_projection_origin < = 90.0`** +
//     **`-90.0 \<= latitude_of_projection_origin \<= 90.0`** +
// The cleanest-looking, which sometimes works for asciidoctor-pdf:
     **`-90.0 \<= latitude_of_projection_origin \<= 90.0`**

Technical Proposal Summary

Change occurrences of <= to \<=.

Benefits

The affected mathematical relationships will no longer be ambiguous.

Status Quo

The affected mathematical relationships are ambiguous.

Associated pull request

#473

[larsbarring]

I reviewed the changes and it looks good. As this PR is correcting a typographical problem within the system and how it renders specific character combination (not even a "typo") it can perhaps be merged immediately?

[davidhassell]

I would have thought so, too. Thanks, Lars. Merging now.