Template regex in `Wtp._encode()` can't match templates that has `-{}-` argument about wikitextprocessor HOT 1 CLOSED

We could steal a MAGIC character slot, replace -{}- with it, and then change it back as needed.

In common we have:
https://github.com/tatuylonen/wikitextprocessor/blob/03d2312b6c59ece309c99e5b013d2dfe96473637/wikitextprocessor/common.py#LL8C1-L17C2

The magic characters and the range are just unused Unicode characters that should be safe to sprinkle into strings.

Here we could add a MAGIC_ZH_PLACEHOLDER by shifting MAGIC_FIRST to 0x0x00102040 and giving 0x0010203f to MAGIC_ZH_PLACEHOLDER, cast it as a character in MAGIC_ZH_PLACEHOLDER_CH and do string replacements back and forth between the magic character and -{}- as needed.

(Note to self: replace magic values with MAGIC_BASE_VALUE + N.)

This is what I did when I needed to somehow fix an issue with quote single quote ' apostrophes inside double-quoted HTML attributes when parsing.

from wikitextprocessor.