Add error messages

Author: lkdvos

src/operators/jordanmpotensor.jl

@@ -72,16 +72,16 @@ function JordanMPOTensor(
     ) where {E, S, TA, TB, TC, TD}
     allVs = eachspace(V)
     VA = space(allVs[2:(end - 1), 1, 1, 2:(end - 1)])
-    VA == space(A) || throw(SpaceMismatch("A-block has incompatible spaces"))
+    VA == space(A) || throw(SpaceMismatch(lazy"A-block has incompatible spaces:\n$VA\n$(space(A))"))
 
     VB = removeunit(space(allVs[2:(end - 1), 1, 1, end]), 4)
-    VB == space(B) || throw(SpaceMismatch("B-block has incompatible spaces"))
+    VB == space(B) || throw(SpaceMismatch(lazy"B-block has incompatible spaces:\n$VB\n$(space(B))"))
 
     VC = removeunit(space(allVs[1, 1, 1, 2:(end - 1)]), 1)
-    VC == space(C) || throw(SpaceMismatch("C-block has incompatible spaces"))
+    VC == space(C) || throw(SpaceMismatch(lazy"C-block has incompatible spaces:\n$VC\n$(space(C))"))
 
     VD = removeunit(removeunit(space(allVs[1, 1, 1, end:end]), 4), 1)
-    VD == space(D) || throw(SpaceMismatch("D-block has incompatible spaces"))
+    VD == space(D) || throw(SpaceMismatch(lazy"D-block has incompatible spaces:\n$VD\n$(space(D))"))
 
     return JordanMPOTensor{E, S, TA, TB, TC, TD}(V, A, B, C, D)
 end