model: Add precision to the documentation of type metrics

Signed-off-by: Jean-Christophe Beaupré <jcbrinfo@users.noreply.github.com>

diff --git a/src/model/model.nit b/src/model/model.nit
index 0d8d6ad..a7f570b 100644 (file)
--- a/src/model/model.nit
+++ b/src/model/model.nit
@@ -1136,6 +1136,7 @@ abstract class MType
        # * H[G[A], B] -> 3
        #
        # Formal types have a depth of 1.
+       # Only `MClassType` and `MFormalType` nodes are counted.
        fun depth: Int
        do
                return 1
@@ -1149,6 +1150,7 @@ abstract class MType
        # * H[G[A], B] -> 4
        #
        # Formal types have a length of 1.
+       # Only `MClassType` and `MFormalType` nodes are counted.
        fun length: Int
        do
                return 1