Enrico Forestieri 0ffcff55f3 Use \ifthenelse instead of relying on TeX primitives
This fixes the issue reported here:
https://www.mail-archive.com/lyx-users@lists.lyx.org/msg115156.html

The problem is due to the use of the mathpazo package because
it defines the macro \f@family as "ppl\n", i.e., it appends a
newline character at the end. Now, the "\if" TeX primitive
expands its arguments for comparing them and the newline causes
a "missing \begin{document}" error. Instead of complicating the
code to account for this, it is better using the ifthen package.
2023-06-19 19:53:16 +02:00
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