Drop redundant @eval module $(gensym()) wrapper from test files (#343)

`ITensorPkgSkeleton.runtests` already wraps each test file in its own
`Module(gensym(:SafeTestset))` (see `_run_isolated_testfile` in
ITensorPkgSkeleton). The per-file `@eval module $(gensym())` wrapper at
the top of each test file therefore creates a redundant
module-inside-a-module. Remove the leading `@eval module $(gensym())`
and the matching trailing `end` from all 22 test files that carried it.

The four files that already used the bare-module style
(`test/test_aqua.jl`, `test/solvers/test_eigsolve.jl`,
`test/solvers/test_applyexp.jl`, `test/solvers/test_iterators.jl`) are
unchanged. Bump patch version 0.19.3 -> 0.19.4 (test-only diff,
substantive per the standard `VersionCheck` classification).

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: mtfishman

Project.toml

@@ -1,6 +1,6 @@
 name = "ITensorNetworks"
 uuid = "2919e153-833c-4bdc-8836-1ea460a35fc7"
-version = "0.19.3"
+version = "0.19.4"
 authors = ["Matthew Fishman <mfishman@flatironinstitute.org>, Joseph Tindall <jtindall@flatironinstitute.org> and contributors"]
 
 [workspace]

test/test_abstractgraph.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using Graphs: add_edge!, add_vertex!
 using NamedGraphs.GraphsExtensions: is_binary_arborescence, is_rooted, root_vertex
 using NamedGraphs: NamedDiGraph
@@ -16,4 +15,3 @@ using Test: @test, @testset
     add_edge!(g, 1, 4)
     @test !is_binary_arborescence(g)
 end
-end

test/test_additensornetworks.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using Graphs: rem_edge!, vertices
 using ITensorNetworks: ITensorNetwork, inner_network, orthogonalize, siteinds, truncate, ttn
 using ITensors: ITensors, apply, inner, op, scalar
@@ -86,4 +85,3 @@ end
         @test ITensors.allfluxequal(ITensors.tensor(ϕ[v]))
     end
 end
-end

test/test_apply.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using Compat: Compat
 using Graphs: vertices
 using ITensorNetworks:
@@ -74,4 +73,3 @@ include("utils.jl")
         @test real(fGBP * conj(fGBP)) >= real(fSBP * conj(fSBP))
     end
 end
-end

test/test_belief_propagation.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using Compat: Compat
 using Graphs: vertices
 using ITensorNetworks: ITensorNetworks, @preserve_graph, BeliefPropagationCache,
@@ -86,4 +85,3 @@ using Test: @test, @testset
         @test iszero(scalar(ψ; alg = "bp"))
     end
 end
-end

test/test_contraction_sequence.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using ITensorNetworks: contraction_sequence, norm_sqr_network, siteinds
 using ITensors: ITensors, contract
 using NamedGraphs.NamedGraphGenerators: named_grid
@@ -43,4 +42,3 @@ include("utils.jl")
         end
     end
 end
-end

test/test_examples.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using ITensorNetworks: ITensorNetworks
 using Suppressor: @suppress
 using Test: @testset
@@ -9,4 +8,3 @@ using Test: @testset
         @suppress include(joinpath(pkgdir(ITensorNetworks), "examples", example_file))
     end
 end
-end

test/test_expect.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using Graphs: SimpleGraph, uniform_tree
 using ITensorNetworks:
     BeliefPropagationCache, ITensorNetwork, expect, original_state_vertex, siteinds
@@ -50,4 +49,3 @@ include("utils.jl")
     sz_exact = expect(ψ, "Sz"; alg = "exact")
     @test sz_bp ≈ sz_exact
 end
-end

test/test_forms.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using DataGraphs: underlying_graph
 using Graphs: nv
 using ITensorNetworks: BeliefPropagationCache, BilinearFormNetwork, LinearFormNetwork,
@@ -91,4 +90,3 @@ include("utils.jl")
     qf = QuadraticFormNetwork(ψket)
     @test scalar(qf; alg = "exact") ≈ inner(ψket, ψket; alg = "exact")
 end
-end

test/test_indsnetwork.jl

@@ -1,4 +1,3 @@
-@eval module $(gensym())
 using DataGraphs: edge_data, vertex_data
 using Dictionaries: Dictionary
 using Graphs: edges, ne, nv, vertices
@@ -181,4 +180,3 @@ end
     @test all(issetequal(is_m[v], union(is1[v], is2[v])) for v in vertices(c))
     @test all(issetequal(is_m[e], union(is1[e], is2[e])) for e in edges(c))
 end
-end