The original decision to escape the legacy symbol library names results
in them being escaped every time they are opened which cause the curly
braces '}' from the original escaping to be escaped on subsequent
openings. This resulted in the symbol library names in the rescue
library not matching the library ID in the schematic.
This fix is likely to have other corner case bugs given the potential
for escaped characters in legacy symbol libraries. Given that we now
have escaped rescue libraries in play, removing the escaping will only
result in more issues so we will have to fix the corner cases as we go.
Fixes https://gitlab.com/kicad/code/kicad/-/issues/11563
Ian McInerney
Marek Roszko
jean-pierre charras
Wayne Stambaugh
Jeff Young