Working test cases for the sophisticated matrix library example from the manual

Fixed the dot operator when used within return types (see tgenericdotrettype)
Fixed the matching of generic concepts aliases used with the implicit generics style

doc/manual/generics.txt

@@ -305,6 +305,9 @@ The concept types can be parametric just like the regular generic types:
 
 .. code-block:: nim
   ### matrixalgo.nim
+  
+  import typetraits
+
   type
     AnyMatrix*[R, C: static[int]; T] = concept m, var mvar, type M
       M.ValueType is T
@@ -314,9 +317,13 @@ The concept types can be parametric just like the regular generic types:
       m[int, int] is T
       mvar[int, int] = T
 
+      type TransposedType = StripGenericParams(M)[C, R, T]
+
     AnySquareMatrix*[N: static[int], T] = AnyMatrix[N, N, T]
 
-  proc transpose*[R, C, T](m: AnyMatrix[R, C, T]): m.type.basis[C, R, T] =
+    AnyTransform3D* = AnyMatrix[4, 4, float]
+
+  proc transposed*(m: AnyMatrix): m.TransposedType =
     for r in 0 .. <m.R:
       for c in 0 .. <m.C:
         result[r, c] = m[c, r]
@@ -324,6 +331,9 @@ The concept types can be parametric just like the regular generic types:
   proc determinant*(m: AnySquareMatrix): int =
     ...
 
+  proc setPerspectiveProjection*(m: AnyTransform3D) =
+    ...
+
   --------------
   ### matrix.nim
 
@@ -331,24 +341,28 @@ The concept types can be parametric just like the regular generic types:
     Matrix*[M, N: static[int]; T] = object
       data: array[M*N, T]
 
-  proc `[]`*(m: Matrix; m, n: int): m.T =
-    m.data[m * m.N + n]
+  proc `[]`*(M: Matrix; m, n: int): M.T =
+    M.data[m * M.N + n]
 
-  proc `[]=`*(m: var Matrix; m, n: int; v: m.T) =
-    m.data[m * m.N + n] = v
+  proc `[]=`*(M: var Matrix; m, n: int; v: M.T) =
+    M.data[m * M.N + n] = v
 
   # Adapt the Matrix type to the concept's requirements
   template Rows*(M: type Matrix): expr = M.M
   template Cols*(M: type Matrix): expr = M.N
   template ValueType*(M: type Matrix): typedesc = M.T
-
+  
   -------------
   ### usage.nim
 
   import matrix, matrixalgo
 
-  var v: Matrix[3, 3, int]
-  echo v.determinant
+  var
+    m: Matrix[3, 3, int]
+    projectionMatrix: Matrix[4, 4, float]
+
+  echo m.transposed.determinant
+  setPerspectiveProjection projectionMatrix
 
 When the concept type is matched against a concrete type, the unbound type
 parameters are inferred from the body of the concept in a way that closely