From ced7bcd482a624a4d54e91e5365772528ae783b1 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mos=C3=A8=20Giordano?= <mose@gnu.org>
Date: Sun, 6 Oct 2024 00:40:10 +0100
Subject: [PATCH 1/2] [LinearAlgebra] Remove unreliable doctests

The exact textual representation of the output of these doctests depend on the
specific kernel used by the BLAS backend, and can vary between versions of
OpenBLAS (as it did in #41973), or between different CPUs, which makes these
doctests unreliable.
---
 stdlib/LinearAlgebra/src/LinearAlgebra.jl | 4 ++--
 stdlib/LinearAlgebra/src/hessenberg.jl    | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/stdlib/LinearAlgebra/src/LinearAlgebra.jl b/stdlib/LinearAlgebra/src/LinearAlgebra.jl
index 17216845b350c..408888adc2533 100644
--- a/stdlib/LinearAlgebra/src/LinearAlgebra.jl
+++ b/stdlib/LinearAlgebra/src/LinearAlgebra.jl
@@ -385,7 +385,7 @@ control over the factorization of `A`.
     these are already in a factorized form
 
 # Examples
-```jldoctest
+```julia-repl
 julia> A = [1 2.2 4; 3.1 0.2 3; 4 1 2];
 
 julia> X = [1; 2.5; 3];
@@ -426,7 +426,7 @@ control over the factorization of `A`.
     these are already in a factorized form
 
 # Examples
-```jldoctest
+```julia-repl
 julia> A = [1 2.2 4; 3.1 0.2 3; 4 1 2];
 
 julia> X = [1; 2.5; 3];
diff --git a/stdlib/LinearAlgebra/src/hessenberg.jl b/stdlib/LinearAlgebra/src/hessenberg.jl
index bbaca3c878293..524e57711ce3a 100644
--- a/stdlib/LinearAlgebra/src/hessenberg.jl
+++ b/stdlib/LinearAlgebra/src/hessenberg.jl
@@ -446,7 +446,7 @@ This is useful because multiple shifted solves `(F + μ*I) \\ b`
 Iterating the decomposition produces the factors `F.Q, F.H, F.μ`.
 
 # Examples
-```jldoctest
+```julia-repl
 julia> A = [4. 9. 7.; 4. 4. 1.; 4. 3. 2.]
 3×3 Matrix{Float64}:
  4.0  9.0  7.0

From f52d5e96d9ba04c4100d1d453ff1353a5c174ca8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Mos=C3=A8=20Giordano?= <mose@gnu.org>
Date: Sun, 6 Oct 2024 13:37:39 +0100
Subject: [PATCH 2/2] [LinearAlgebra] Restore two doctests, but avoid printing
 numerical output

---
 stdlib/LinearAlgebra/src/LinearAlgebra.jl | 30 +++++------------------
 1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/stdlib/LinearAlgebra/src/LinearAlgebra.jl b/stdlib/LinearAlgebra/src/LinearAlgebra.jl
index 408888adc2533..3ecb714a6cfe1 100644
--- a/stdlib/LinearAlgebra/src/LinearAlgebra.jl
+++ b/stdlib/LinearAlgebra/src/LinearAlgebra.jl
@@ -385,7 +385,7 @@ control over the factorization of `A`.
     these are already in a factorized form
 
 # Examples
-```julia-repl
+```jldoctest
 julia> A = [1 2.2 4; 3.1 0.2 3; 4 1 2];
 
 julia> X = [1; 2.5; 3];
@@ -394,17 +394,8 @@ julia> Y = zero(X);
 
 julia> ldiv!(Y, qr(A), X);
 
-julia> Y
-3-element Vector{Float64}:
-  0.7128099173553719
- -0.051652892561983674
-  0.10020661157024757
-
-julia> A\\X
-3-element Vector{Float64}:
-  0.7128099173553719
- -0.05165289256198333
-  0.10020661157024785
+julia> Y ≈ A\\X
+true
 ```
 """
 ldiv!(Y, A, B)
@@ -426,7 +417,7 @@ control over the factorization of `A`.
     these are already in a factorized form
 
 # Examples
-```julia-repl
+```jldoctest
 julia> A = [1 2.2 4; 3.1 0.2 3; 4 1 2];
 
 julia> X = [1; 2.5; 3];
@@ -435,17 +426,8 @@ julia> Y = copy(X);
 
 julia> ldiv!(qr(A), X);
 
-julia> X
-3-element Vector{Float64}:
-  0.7128099173553719
- -0.051652892561983674
-  0.10020661157024757
-
-julia> A\\Y
-3-element Vector{Float64}:
-  0.7128099173553719
- -0.05165289256198333
-  0.10020661157024785
+julia> X ≈ A\\Y
+true
 ```
 """
 ldiv!(A, B)