Fix F.SUM(F.PT) in ThOr transition tutorial

APT was incorrectly translated to F.SUM(F.PT) instead of F.PT in the ThOr transition tutorial.

Fixes #312 (closed).

added Documentation ThOr labels

assigned to @msaur

@chasse Ready to be merged, documentation-only change. Related to #323 (closed).

assigned to @chasse

added bug fix label

approved this merge request

merged

mentioned in commit 8851ea16

mentioned in issue #324 (closed)

removed bug fix label