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Copy caveats from RELEASE-NOTES to UPGRADING

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Scott Kostyshak 2018-02-22 23:23:32 -05:00
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@ -9,26 +9,14 @@ to add new templates or modify existing ones. If you have modified
the external_templates file, you will have to move the modifications to
the respective *.xtemplate file manually.
By default, LyX 2.3 forces output of all en and em dashes as -- and ---
when exporting to LaTeX. This can lead to incorrect line breaks, wrong
characters in typewriter fonts, and problems with some LaTeX packages.
Unselect "Document->Settings->Fonts->Output em- and en-dash as ligatures"
to keep the LyX 2.2 behaviour and avoid these problems. See chapter 3.9.1.1
"Dashes and line breaks" of the User Guide for details.
ZWSP characters (u200b) following literal em- and en-dashes are deleted by
lyx2lyx when converting to 2.3 format. If you used them as optional line
breaks after dashes, convert them to space insets before opening your
document with LyX 2.3 or the optional line breaks will be lost!
If using TeX fonts and en- and em-dashes are output as font ligatures,
when exporting documents containing en- and em-dashes to the format of
LyX 2.0 or earlier, the following line has to be manually added to the
unicodesymbols file of that LyX version:<br>
0x200b "\\hspace{0pt}" "" "" "" "" # ZERO WIDTH SPACE<br>
This avoids "uncodable character" issues if the document is actually
loaded by that LyX version. LyX 2.1 and later versions already have the
necessary definition in their unicodesymbols file.
By default, LyX 2.3 outputs en- and em-dashes as -- and --- respectively,
so that a line break can occur in the output immediately after the dash.
Sometimes, this results in undesired line breaks or overfull lines due to
suppression of hyphenation in the word preceding the dash.
Select "Document->Settings->Fonts->Disallow line breaks after dashes"
to keep the LyX 2.2 behaviour.
See chapter 3.9.1.1, "Dashes and Line Breaks", of the User Guide
for details.
If trying to compile documents using R scripts and sweave/knitr, LyX
2.3.x would not allow for re-running the R scripts, unless the user: