diff --git a/src/arithmetic.jl b/src/arithmetic.jl
index 91b37ee..bf097a2 100644
--- a/src/arithmetic.jl
+++ b/src/arithmetic.jl
@@ -5,7 +5,7 @@ end
 
 function _preallocate_output(X::AlgebraElement, Y::AlgebraElement, op)
     T = Base._return_type(op, Tuple{eltype(X),eltype(Y)})
-    if coeffs(Y) isa DenseArray
+    if coeffs(Y) isa DenseArray # what a hack :)
         return similar(Y, T)
     end
     return similar(X, T)
@@ -108,5 +108,3 @@ function MA.operate_to!(
     MA.operate_to!(coeffs(res), mstr, coeffs(X), coeffs(Y))
     return res
 end
-
-
diff --git a/src/bases.jl b/src/bases.jl
index 50cd807..afd5951 100644
--- a/src/bases.jl
+++ b/src/bases.jl
@@ -62,11 +62,7 @@ end
 Translate coefficients `cfs` in `source::AbstractBasis` to basis
 `target::AbstractBasis`.
 """
-function coeffs(
-    cfs,
-    source::AbstractBasis,
-    target::AbstractBasis,
-)
+function coeffs(cfs, source::AbstractBasis, target::AbstractBasis)
     source === target && return cfs
     source == target && return cfs
     res = zero_coeffs(valtype(cfs), target)
diff --git a/src/bases_dirac.jl b/src/bases_dirac.jl
index d04b2c5..e4135ef 100644
--- a/src/bases_dirac.jl
+++ b/src/bases_dirac.jl
@@ -2,7 +2,7 @@ mutable struct DiracBasis{T,I,S,M<:DiracMStructure} <: ImplicitBasis{T,I}
     object::S # any iterable
     moperation::M
 
-    function DiracBasis{I}(itr, operation=*) where {I}
+    function DiracBasis{I}(itr, operation = *) where {I}
         @assert !isempty(itr)
         mstr = DiracMStructure(operation)
         return new{eltype(itr),I,typeof(itr),typeof(mstr)}(itr, mstr)
@@ -12,8 +12,9 @@ end
 object(db::DiracBasis) = db.object
 mstructure(db::DiracBasis{T}) where {T} = db.moperation
 
-
-Base.IteratorSize(::Type{<:DiracBasis{T,I,S}}) where {T,I,S} = Base.IteratorSize(S)
+function Base.IteratorSize(::Type{<:DiracBasis{T,I,S}}) where {T,I,S}
+    return Base.IteratorSize(S)
+end
 function Base.length(db::DiracBasis)
     @assert Base.haslength(object(db))
     return length(object(db))
diff --git a/src/bases_fixed.jl b/src/bases_fixed.jl
index d37e059..ce302b7 100644
--- a/src/bases_fixed.jl
+++ b/src/bases_fixed.jl
@@ -39,4 +39,3 @@ Base.@propagate_inbounds Base.getindex(
     b::FixedBasis{T,I},
     i::I,
 ) where {T,I<:Integer} = b.elts[i]
-
diff --git a/src/mstructures.jl b/src/mstructures.jl
index 686cca7..8c288f4 100644
--- a/src/mstructures.jl
+++ b/src/mstructures.jl
@@ -5,12 +5,15 @@ struct ProductNotWellDefined <: Exception
 end
 
 function Base.showerror(io::IO, ex::ProductNotWellDefined)
-    print(io, "Product of elements $(ex.i) and $(ex.j) is not defined on the basis")
+    print(
+        io,
+        "Product of elements $(ex.i) and $(ex.j) is not defined on the basis",
+    )
     print(io, " or the multiplicative structure could not be completed")
     if isdefined(ex, :msg)
         print(io, ": $(ex.msg)")
     end
-    print(io, ".")
+    return print(io, ".")
 end
 
 """
@@ -86,4 +89,3 @@ function (mstr::DiracMStructure)(x::T, y::T) where {T}
     xy = mstr.op(x, y)
     return SparseCoefficients((xy,), (1,))
 end
-
diff --git a/src/sparse_coeffs.jl b/src/sparse_coeffs.jl
index 0808299..4d8e031 100644
--- a/src/sparse_coeffs.jl
+++ b/src/sparse_coeffs.jl
@@ -68,11 +68,7 @@ function MA.operate!(::typeof(canonical), res::SparseCoefficients)
     return MA.operate!(canonical, res, comparable(key_type(res)))
 end
 
-function MA.operate!(
-    ::typeof(canonical),
-    res::SparseCoefficients,
-    cmp,
-)
+function MA.operate!(::typeof(canonical), res::SparseCoefficients, cmp)
     sorted = issorted(res.basis_elements; lt = cmp)
     distinct = allunique(res.basis_elements)
     if sorted && distinct && !any(iszero, res.values)
diff --git a/src/types.jl b/src/types.jl
index ae4d827..11a37d5 100644
--- a/src/types.jl
+++ b/src/types.jl
@@ -11,8 +11,7 @@ function _sanity_checks(coeffs::AbstractVector, A::AbstractStarAlgebra)
 end
 
 # concrete implementation
-struct StarAlgebra{O,T,B<:AbstractBasis{T}} <:
-       AbstractStarAlgebra{O,T}
+struct StarAlgebra{O,T,B<:AbstractBasis{T}} <: AbstractStarAlgebra{O,T}
     object::O
     basis::B
 
@@ -47,7 +46,7 @@ end
 
 function AlgebraElement(
     coeffs::SparseCoefficients{T},
-    A::AbstractStarAlgebra{O,T}
+    A::AbstractStarAlgebra{O,T},
 ) where {O,T}
     return AlgebraElement{typeof(A),valtype(coeffs),typeof(coeffs)}(coeffs, A)
 end
@@ -103,7 +102,9 @@ end
 
 (A::AbstractStarAlgebra)(x::Number) = x * one(A)
 
-Base.similar(X::AlgebraElement, T=eltype(X)) = AlgebraElement(similar(coeffs(X), T), parent(X))
+function Base.similar(X::AlgebraElement, T = eltype(X))
+    return AlgebraElement(similar(coeffs(X), T), parent(X))
+end
 
 function AlgebraElement{T}(X::AlgebraElement) where {T}
     v = coeffs(X)
diff --git a/test/mtables.jl b/test/mtables.jl
index 3d56b77..7c38f6a 100644
--- a/test/mtables.jl
+++ b/test/mtables.jl
@@ -1,5 +1,5 @@
 @testset "TrivialMStructure" begin
-    b = StarAlgebras.Basis{UInt8}(words([:a, :b, :c], radius=4))
+    b = StarAlgebras.Basis{UInt8}(words([:a, :b, :c]; radius = 4))
 
     mstr = StarAlgebras.TrivialMStructure(b)
 
@@ -36,9 +36,9 @@
 end
 
 @testset "MTable" begin
-    b = StarAlgebras.Basis{UInt16}(words([:a, :b, :c, :d], radius=4))
+    b = StarAlgebras.Basis{UInt16}(words([:a, :b, :c, :d]; radius = 4))
     k = findfirst(w -> length(w) == 3, b) - 1
-    mstr = StarAlgebras.MTable(b, size=(k, k))
+    mstr = StarAlgebras.MTable(b; size = (k, k))
 
     @test_throws String StarAlgebras.basis(mstr)
 
@@ -47,25 +47,31 @@ end
         mstr[i, j] == b[b[i]*b[j]] for i in axes(mstr, 1) for j in axes(mstr, 2)
     )
     @test all(
-        mstr[-i, j] == b[star(b[i])*b[j]] for i in axes(mstr, 1) for j in axes(mstr, 2)
+        mstr[-i, j] == b[star(b[i])*b[j]] for i in axes(mstr, 1) for
+        j in axes(mstr, 2)
     )
     @test all(
-        mstr[i, -j] == b[b[i]*star(b[j])] for i in axes(mstr, 1) for j in axes(mstr, 2)
+        mstr[i, -j] == b[b[i]*star(b[j])] for i in axes(mstr, 1) for
+        j in axes(mstr, 2)
     )
     @test all(
-        mstr[-i, -j] == b[star(b[i])*star(b[j])] for i in axes(mstr, 1) for j in axes(mstr, 2)
+        mstr[-i, -j] == b[star(b[i])*star(b[j])] for i in axes(mstr, 1) for
+        j in axes(mstr, 2)
     )
 end
 
 @testset "CachedMTable" begin
-    b = StarAlgebras.Basis{UInt8}(words([:a, :b, :c], radius=4))
+    b = StarAlgebras.Basis{UInt8}(words([:a, :b, :c]; radius = 4))
     k = findfirst(w -> length(w) == 3, b) - 1
 
-    mstr = StarAlgebras.CachedMTable(b, table_size=(k, k))
+    mstr = StarAlgebras.CachedMTable(b; table_size = (k, k))
     @test mstr isa StarAlgebras.CachedMTable{UInt8,Word{Symbol}}
     @test mstr.table.table isa Matrix{UInt8}
 
-    @test_throws StarAlgebras.ProductNotDefined StarAlgebras._check(mstr.table.table, StarAlgebras.basis(mstr))
+    @test_throws StarAlgebras.ProductNotDefined StarAlgebras._check(
+        mstr.table.table,
+        StarAlgebras.basis(mstr),
+    )
 
     StarAlgebras.complete!(mstr)
     @test all(!iszero, mstr.table)
@@ -78,7 +84,7 @@ end
 
     @test mstr == mstr_sparse
 
-    mstr = StarAlgebras.CachedMTable(b, table_size=(k, k))
+    mstr = StarAlgebras.CachedMTable(b; table_size = (k, k))
 
     @test all(iszero, mstr.table.table)
     StarAlgebras.cache!(mstr, 1, 2)
@@ -100,7 +106,7 @@ end
 
     @test_throws StarAlgebras.ProductNotDefined mstr[k+1, k]
 
-    mstr = StarAlgebras.CachedMTable(b, table_size=(k, k))
+    mstr = StarAlgebras.CachedMTable(b; table_size = (k, k))
     @test all(iszero, mstr.table.table)
     @test mstr[-1, 2] == 2
     @test mstr[-2, 3] == b[star(b[2])*b[3]]
diff --git a/test/perm_grp_algebra.jl b/test/perm_grp_algebra.jl
index 9de784b..950431f 100644
--- a/test/perm_grp_algebra.jl
+++ b/test/perm_grp_algebra.jl
@@ -31,7 +31,6 @@
     @test x * z == xz
 
     @testset "Augmented basis" begin
-
         ad = SA.AugmentedBasis(db)
         @test SA.mstructure(ad) == SA.AugmentedMStructure(SA.mstructure(db))
         @test ad[SA.Augmented(h)] isa SA.Augmented
diff --git a/test/runtests.jl b/test/runtests.jl
index 89228dc..8e9866c 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -43,4 +43,3 @@ include("test_example_words.jl")
     end
     include("sum_of_squares.jl")
 end
-
diff --git a/test/test_example_words.jl b/test/test_example_words.jl
index 83ce257..5093366 100644
--- a/test/test_example_words.jl
+++ b/test/test_example_words.jl
@@ -17,7 +17,9 @@ function Base.show(io::IO, w::Word)
     end
 end
 
-Base.:(==)(w::Word, v::Word) = w.alphabet == v.alphabet && w.letters == v.letters
+function Base.:(==)(w::Word, v::Word)
+    return w.alphabet == v.alphabet && w.letters == v.letters
+end
 Base.hash(w::Word, h::UInt) = hash(w.alphabet, hash(w.letters, hash(Word, h)))
 
 Base.one(w::Word) = Word(w.alphabet, Int[])