Fixes in doc/source/tutorial/energy.rst

3 jobs for energy-params in 12 minutes and 26 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build:package #96122

00:01:26

 
  Test
failed build:documentation #96124

00:11:00

passed test:package #96123

00:10:16

 
Name Stage Failure
failed
build:documentation Test
-> 1522                     raise child_exception_type(errno_num, err_msg, err_filename)
1523 raise child_exception_type(err_msg)
1524

FileNotFoundError: [Errno 2] No such file or directory: 'dvipng': 'dvipng'
make: *** [Makefile:210: doctest] Error 2
make: Leaving directory '/builds/spec-gmt/tkwant-energy-transport/doc'
Authenticating with credentials from /root/.docker/config.json
ERROR: Job failed: exit code 1