Fix modules/ typos

Found using `codespell -q 3 -S ./3rdparty -L activ,amin,ang,atleast,childs,dof,endwhile,halfs,hist,iff,nd,od,uint`

backporting of commit: ec43292e1e

modules/core/test/test_eigen.cpp

@@ -73,7 +73,7 @@ public:
 protected:
 
     bool test_values(const cv::Mat& src);												// complex test for eigen without vectors
-    bool check_full(int type);													// compex test for symmetric matrix
+    bool check_full(int type);													// complex test for symmetric matrix
     virtual void run (int) = 0;													// main testing method
 
 protected: