Create component `unit` for `ishape_last.txt` in derived type
`shpc_slice_handler`. Open, create and close `ishape_last.txt` at the
same time we open, create and close the shapefiles. So we use
`read_opcol` instead of `read_column` when we need to read
`ishape_last.txt`.

We are more clearly separating opening files and reading from them.

Use `e_overestim.txt` instead of `node_id_param.json`. Since commit
43d2eff6, we wrote only `e_overestim` to the JSon file. Simpler to
write the value alone in a text file.

Option should have been updated in commit e35226da.

Bad names from commit c45cd728.

Following renaming of script.

Add tests for a case where the speed is not defined on a whole segment.

Add a test that is going through `is_node_type` with an integer label.

Following update of `test_compare.py`.

Use the env keyword of `test_compare.py` rather than setting env on
the command line. This seems a little clearer and it allows us to
remove the stdout line in the test description. The possibility to add
env was added to `test_compare.py` in commit 4964d767 of the
`Test_compare` repository, after replacing mpiexec by `$mpiexec` in
`eddy_graph.sh`, in commit 850efa4b of the present repository.

In particular for several SHPC.

Generalize `test_read_snapshot` to accept several SHPC onthe command line.

Use the first date of the SHPC as default date to read.

Because we are going to use the first date from hshp as a default date
to read.

See commit a86422ee.

Read name of input SHPC for program `test_read_eddy` from the command line.

Following modifications of `CMakeLists.txt` files.

With `target_sources` rather than referring to their path from another
directory.

With `target_sources` rather than referring to their path from another
directory.

Since `NR_util` has been integrated into Jumble.

Following update of the library.

But reading from them is not here yet.

Since `shpc_open` is called by all processes, reading d0 and
`ishape_last` in `shpc_open` implies that we do not broadcast d0 and
`ishape_last`.

Since processes need d0 to allocate `ishape_last`.