better word form, maybe.

(avoids spellcheck issue, also)

doc/Language/operators.pod6

@@ -699,7 +699,7 @@ Increments its argument by one, and returns the original value.X<|increment oper
     say $x;         # 4
 
 It works by calling the L<succ> method (for I<successor>) on its argument,
-which gives custom types the freedom to implement their own incrementation
+which gives custom types the freedom to implement their own increment
 semantics.
 
 Note that this does not necessarily return its argument. For example for
@@ -722,7 +722,7 @@ Decrements its argument by one, and returns the original value.X<|decrement oper
     say $x;         # 2
 
 It works by calling the L<pred> method (for I<predecessor>) on its argument,
-which gives custom types the freedom to implement their own decrementation
+which gives custom types the freedom to implement their own decrement
 semantics.
 
 Note that this does not necessarily return its argument. For example for