io.aslatex() should not nest arrays blocks with terms_per_line argument

[redeboer]

What happened?

It seems that the new qrules.io.asdot(..., terms_per_line=1) results in nested \begin{array} blocks. This is not required: just use the same array from the top and break with \\ &&.

Relevant log output

qrules.io.aslatex({k: v for i, (k, v) in enumerate(MODEL4BODY.amplitudes.items()) if i < 1}, terms_per_line=1)

\begin{array}{rcl}
  A^{01,23}_{\frac{1}{2}, 0, 0, - \frac{1}{2}, - \frac{1}{2}} &=& \begin{array}{l}
  C_{B^{0} \to J/\psi(1S)_{0} {f_{0}(1370)}_{0}; J/\psi(1S) \to K^{-}_{0} \pi^{+}_{0}; f_{0}(1370) \to \mu^{+}_{+1/2} \mu^{-}_{+1/2}} D^{0}_{0,0}\left(- \phi^{23}_{2},\theta^{23}_{2},0\right) D^{0}_{\frac{1}{2},0}\left(- \phi_{01},\theta_{01},0\right) D^{1}_{0,0}\left(- \phi^{01}_{0},\theta^{01}_{0},0\right) \\
  \; + \; C_{B^{0} \to J/\psi(1S)_{0} {f_{0}(1500)}_{0}; J/\psi(1S) \to K^{-}_{0} \pi^{+}_{0}; f_{0}(1500) \to \mu^{+}_{+1/2} \mu^{-}_{+1/2}} D^{0}_{0,0}\left(- \phi^{23}_{2},\theta^{23}_{2},0\right) D^{0}_{\frac{1}{2},0}\left(- \phi_{01},\theta_{01},0\right) D^{1}_{0,0}\left(- \phi^{01}_{0},\theta^{01}_{0},0\right) \\
  \; + \; C_{B^{0} \to J/\psi(1S)_{0} {f_{0}(1710)}_{0}; J/\psi(1S) \to K^{-}_{0} \pi^{+}_{0}; f_{0}(1710) \to \mu^{+}_{+1/2} \mu^{-}_{+1/2}} D^{0}_{0,0}\left(- \phi^{23}_{2},\theta^{23}_{2},0\right) D^{0}_{\frac{1}{2},0}\left(- \phi_{01},\theta_{01},0\right) D^{1}_{0,0}\left(- \phi^{01}_{0},\theta^{01}_{0},0\right) \\
  \; + \; C_{B^{0} \to J/\psi(1S)_{0} {f_{0}(2020)}_{0}; J/\psi(1S) \to K^{-}_{0} \pi^{+}_{0}; f_{0}(2020) \to \mu^{+}_{+1/2} \mu^{-}_{+1/2}} D^{0}_{0,0}\left(- \phi^{23}_{2},\theta^{23}_{2},0\right) D^{0}_{\frac{1}{2},0}\left(- \phi_{01},\theta_{01},0\right) D^{1}_{0,0}\left(- \phi^{01}_{0},\theta^{01}_{0},0\right) \\
  \; + \; C_{B^{0} \to J/\psi(1S)_{0} {f_{0}(500)}_{0}; J/\psi(1S) \to K^{-}_{0} \pi^{+}_{0}; f_{0}(500) \to \mu^{+}_{+1/2} \mu^{-}_{+1/2}} D^{0}_{0,0}\left(- \phi^{23}_{2},\theta^{23}_{2},0\right) D^{0}_{\frac{1}{2},0}\left(- \phi_{01},\theta_{01},0\right) D^{1}_{0,0}\left(- \phi^{01}_{0},\theta^{01}_{0},0\right) \\
  \; + \; C_{B^{0} \to J/\psi(1S)_{0} {f_{0}(980)}_{0}; J/\psi(1S) \to K^{-}_{0} \pi^{+}_{0}; f_{0}(980) \to \mu^{+}_{+1/2} \mu^{-}_{+1/2}} D^{0}_{0,0}\left(- \phi^{23}_{2},\theta^{23}_{2},0\right) D^{0}_{\frac{1}{2},0}\left(- \phi_{01},\theta_{01},0\right) D^{1}_{0,0}\left(- \phi^{01}_{0},\theta^{01}_{0},0\right) \\
\end{array} \\
\end{array}

Is it possible to reproduce the bug with a small code snippet?

While investigating B0 -> (J/psi->mu+mu-) pi K:

from qrules.transition import StateTransitionManager

stm = StateTransitionManager(
    initial_state=[("B0", [+0.5])],
    final_state=["K-", "pi+", "mu+", "mu-"],
    formalism="helicity",
)
stm.add_final_state_grouping([["K-", "pi+"], ["mu+", "mu-"]])
stm.set_allowed_intermediate_particles(r"^(J/psi\(1S\)|f\(0\).*)$", regex=True)
problem_sets = stm.create_problem_sets()
reaction_full = stm.find_solutions(problem_sets)


```python
import qrules

reaction= qrules.ReactionInfo(
    transitions=tuple(
        transition
        for transition in reaction_full.transitions
        if transition.states[4].particle.name == "J/psi(1S)"
    ),
    formalism=reaction4body_full.formalism,
)

import ampform

builder = ampform.get_builder(REACTION4BODY)
builder.adapter.permutate_registered_topologies()
builder.config.scalar_initial_state_mass = True
builder.config.stable_final_state_ids = reaction.final_state
model = builder.formulate()
model.intensity.cleanup()

### Additional steps to reproduce the bug

_No response_

### Which Python version were you using?

Python 3.12

### Python dependencies

```plain text
absl-py==2.1.0
ampform==0.15.4
ampform-dpd==0.2.0
anyio==4.4.0
argon2-cffi==23.1.0
argon2-cffi-bindings==21.2.0
arrow==1.3.0
asttokens==2.4.1
astunparse==1.6.3
async-lru==2.0.4
attrs==23.2.0
Babel==2.15.0
beautifulsoup4==4.12.3
bleach==6.1.0
cattrs==23.2.3
certifi==2024.6.2
cffi==1.16.0
cfgv==3.4.0
charset-normalizer==3.3.2
cloudpickle==3.0.0
colorama==0.4.6
comm==0.2.2
contourpy==1.2.1
cycler==0.12.1
debugpy==1.8.1
decorator==5.1.1
defusedxml==0.7.1
distlib==0.3.8
dm-tree==0.1.8
docstring-to-markdown==0.15
executing==2.0.1
fastjsonschema==2.19.1
filelock==3.14.0
flatbuffers==24.3.25
fonttools==4.53.0
fqdn==1.5.1
gast==0.5.4
gitdb==4.0.11
GitPython==3.1.43
google-pasta==0.2.0
graphviz==0.20.3
grpcio==1.64.0
h11==0.14.0
h5py==3.11.0
hepunits==2.3.3
httpcore==1.0.5
httpx==0.27.0
identify==2.5.36
idna==3.7
iminuit==2.26.0
ipykernel==6.29.4
ipython==8.25.0
ipywidgets==8.1.3
isoduration==20.11.0
isort==5.13.2
jax==0.4.28
jaxlib==0.4.28
jedi==0.19.1
Jinja2==3.1.4
json5==0.9.25
jsonpointer==2.4
jsonschema==4.22.0
jsonschema-specifications==2023.12.1
jupyter-events==0.10.0
jupyter-lsp==2.2.5
jupyter-server-mathjax==0.2.6
jupyter_client==8.6.2
jupyter_core==5.7.2
jupyter_server==2.14.1
jupyter_server_terminals==0.5.3
jupyterlab==4.2.1
jupyterlab-lsp==5.1.0
jupyterlab_code_formatter==2.2.1
jupyterlab_git==0.50.1
jupyterlab_pygments==0.3.0
jupyterlab_server==2.27.2
jupyterlab_widgets==3.0.11
keras==3.3.3
kiwisolver==1.4.5
libclang==18.1.1
lsprotocol==2023.0.1
Markdown==3.6
markdown-it-py==3.0.0
MarkupSafe==2.1.5
matplotlib==3.9.0
matplotlib-inline==0.1.7
mdurl==0.1.2
mistune==3.0.2
ml-dtypes==0.3.2
mpmath==1.3.0
namex==0.0.8
nbclient==0.10.0
nbconvert==7.16.4
nbdime==4.0.1
nbformat==5.10.4
nest-asyncio==1.6.0
nodeenv==1.9.0
notebook_shim==0.2.4
numpy==1.26.4
opt-einsum==3.3.0
optree==0.11.0
overrides==7.7.0
packaging==24.0
pandas==2.2.2
pandocfilters==1.5.1
parso==0.8.4
particle==0.24.0
pexpect==4.9.0
phasespace==1.10.3
pillow==10.3.0
platformdirs==4.2.2
pluggy==1.5.0
pre-commit==3.7.1
prometheus_client==0.20.0
prompt_toolkit==3.0.45
protobuf==4.25.3
psutil==5.9.8
ptyprocess==0.7.0
pure-eval==0.2.2
pycparser==2.22
Pygments==2.18.0
pyparsing==3.1.2
python-constraint2==2.0.0b5
python-dateutil==2.9.0.post0
python-json-logger==2.0.7
python-lsp-jsonrpc==1.1.2
python-lsp-ruff==2.2.1
python-lsp-server==1.11.0
pytz==2024.1
PyYAML==6.0.1
pyzmq==26.0.3
qrules==0.10.2
referencing==0.35.1
requests==2.32.3
rfc3339-validator==0.1.4
rfc3986-validator==0.1.1
rich==13.7.1
rpds-py==0.18.1
ruff==0.4.7
scipy==1.13.1
Send2Trash==1.8.3
setuptools==69.5.1
six==1.16.0
smmap==5.0.1
sniffio==1.3.1
soupsieve==2.5
stack-data==0.6.3
sympy==1.12.1
tensorboard==2.16.2
tensorboard-data-server==0.7.2
tensorflow==2.16.1
tensorflow-probability==0.24.0
tensorwaves==0.4.12
termcolor==2.4.0
terminado==0.18.1
tinycss2==1.3.0
tornado==6.4
tqdm==4.66.4
traitlets==5.14.3
types-python-dateutil==2.9.0.20240316
typing_extensions==4.12.1
tzdata==2024.1
ujson==5.10.0
uri-template==1.3.0
urllib3==2.2.1
uv==0.2.5
virtualenv==20.26.2
wcwidth==0.2.13
webcolors==1.13
webencodings==0.5.1
websocket-client==1.8.0
Werkzeug==3.0.3
wheel==0.43.0
widgetsnbextension==4.0.11
wrapt==1.16.0