Typo (#353)

Author: t-bltg

src/common.jl

@@ -201,7 +201,7 @@ companion(::AbstractPolynomial)
 """
     vander(::Type{AbstractPolynomial}, x::AbstractVector, deg::Integer)
 
-Calculate the psuedo-Vandermonde matrix of the given polynomial type with the given degree.
+Calculate the pseudo-Vandermonde matrix of the given polynomial type with the given degree.
 
 # References
 [Vandermonde Matrix](https://en.wikipedia.org/wiki/Vandermonde_matrix)