Interesting discovery from automatic tools (python code)

[José Matos]

Yesterday I found a tool to upgrade the python code to new versions.

https://github.com/asottile/pyupgrade

This is interesting in itself. :-)

First because it allows to upgrade the code to a given version, such as
it is I have applied in a way that it is compatible with python 2.7
that we support for lyx 2.4.

I have applied it to lyx2lyx code and the result is attached.

Other than the change to lyx2lyx_tools.py that changes from the dict
call to a dictionary comprehension the other changes corresponds to
bugs in the present code:

For example:
"\label{" -> "\\label{"

You do not need to be a python expert to understand why the initial
code is wrong. The python strings use the same escape sequences as
C/C++.

In this case the code just works because "\l" is not an escape sequence
and is thus it is ignored.

I think that this should be applied.

Due to the issue with the supported version of keys in ssh I can not
commit directly. :-(

Have a nice weekend,
-- 
José Abílio
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