The old :left vs :right got me again (#1582)

src/Solve.jl

@@ -651,15 +651,15 @@ end
 function check_linear_system_dim_right(A::Union{MatElem, SolveCtx}, b::MatElem, throw_error::Bool = true)
   fl = nrows(A) == nrows(b)
   if !fl && throw_error
-    error("Incompatible number of rows in linear system (use `side = :left` to switch to an action from the left)")
+    error("Incompatible number of rows in linear system (use `side = :left` for a system with the indeterminate on the left)")
   end
   return fl
 end
 
 function check_linear_system_dim_right(A::Union{MatElem, SolveCtx}, b::Vector, throw_error::Bool = true)
   fl = nrows(A) == length(b)
   if !fl && throw_error
-    error("Incompatible number of rows in linear system (use `side = :left` to switch to an action from the left)")
+    error("Incompatible number of rows in linear system (use `side = :left` for a system with the indeterminate on the left)")
   end
   return fl
 end
@@ -668,15 +668,15 @@ end
 function check_linear_system_dim_left(A::Union{MatElem, SolveCtx}, b::MatElem, throw_error::Bool = true)
   fl = ncols(A) == ncols(b)
   if !fl && throw_error
-    error("Incompatible number of columns in linear system (use `side = :right` to switch to an action from the right)")
+    error("Incompatible number of columns in linear system (use `side = :right` for a system with the indeterminate on the right)")
   end
   return fl
 end
 
 function check_linear_system_dim_left(A::Union{MatElem, SolveCtx}, b::Vector, throw_error::Bool = true)
   fl = ncols(A) == length(b)
   if !fl && throw_error
-    error("Incompatible number of columns in linear system (use `side = :right` to switch to an action from the right)")
+    error("Incompatible number of columns in linear system (use `side = :right` for a system with the indeterminate on the right)")
   end
   return fl
 end