fix docs

Author: 9il

source/mir/algorithm/iteration.d

@@ -14,6 +14,7 @@ $(T2 eachLower, Iterates lower triangle of matrix.)
 $(T2 eachUploPair, Iterates upper and lower pairs of elements in square matrix.)
 $(T2 eachUpper, Iterates upper triangle of matrix.)
 $(T2 equal, Compares two slices for equality.)
+$(T2 filter, Filters elements in a range or an ndslice.)
 $(T2 find, Finds backward index.)
 $(T2 findIndex, Finds index.)
 $(T2 isSymmetric, Checks if the matrix is symmetric.)
@@ -25,7 +26,7 @@ $(T2 minmaxPos, Finds backward indexes of the minimum and the maximum.)
 $(T2 minPos, Finds backward index of the minimum.)
 $(T2 nBitsToCount, Сount bits until set bit count is reached.)
 $(T2 reduce, Accumulates all elements.)
-$(T2 uniq, Iterates over the unique elements in a range, which is assumed sorted.)
+$(T2 uniq, Iterates over the unique elements in a range or an ndslice, which is assumed sorted.)
 )
 
 All operators are suitable to change slices using `ref` argument qualification in a function declaration.