Previously we used named character references with html5 output.
But these aren't valid XML, and we aim to produce html5 that is
also valid XHTML (polyglot markup). (This is also needed for
epub3.)
Closes#5718.
`\ldots{}.` doesn't behave as well as `\ldots.` with the latex
ellipsis package. This patch causes pandoc to avoid emitting
the `{}` when it is not necessary. Now `\ldots` and other
control sequences used in escaping will be followed by either
a `{}`, a space, or nothing, depending on context.
Thanks to Elliott Slaughter for the suggestion.
- `--ascii` is now turned on automatically for man output, for
portability. All man output will be escaped to ASCII.
- In T.P.Writers.Groff, `escapeChar`, `escapeString`, and
`escapeCode` now take a boolean parameter that selects
ascii-only output. This is used by the Ms writer for
`--ascii`, instead of doing an extra pass after writing
the document.
- In ms output without `--ascii`, unicode is used whenever
possible (e.g. for double quotes).
- A few escapes are changed: e.g. `\[rs]` instead of `\\` for
backslash, and `\ga]` instead of `` \` `` for backtick.
Now the `write*` functions for Docbook, HTML, ICML, JATS,
Man, Ms, OPML are sensitive to `writerPreferAscii`. Previously
the to-ascii translation was done in Text.Pandoc.App, and
thus not available to those using the writer functions
directly.
In addition, the LaTeX writer is now sensitive to
`writerPreferAscii` and to `--ascii`. 100% ASCII
output can't be guaranteed, but the writer will use
commands like `\"{a}` and `\l` whenever possible,
to avoid emiting a non-ASCII character.
A new unexported module, Text.Pandoc.Groff, has been
added to store functions used in the different groff-based
writers.
