Fix some doc comments

Fixes:

- formatting
- inconsistencies
- grammar
- wrapping
- code examples

for following operators:

- Interleave
- Lag
- Lead
- Permutations
- Slice
- SortedMerge
- Subsets
- Window

MoreLinq/Interleave.cs

@@ -24,24 +24,31 @@ namespace MoreLinq
     public static partial class MoreEnumerable
     {
         /// <summary>
-        /// Interleaves the elements of two or more sequences into a single sequence, skipping sequences as they are consumed
+        /// Interleaves the elements of two or more sequences into a single sequence, skipping
+        /// sequences as they are consumed.
         /// </summary>
+        /// <typeparam name="T">The type of the elements of the source sequences.</typeparam>
+        /// <param name="sequence">The first sequence in the interleave group.</param>
+        /// <param name="otherSequences">The other sequences in the interleave group.</param>
+        /// <returns>A sequence of interleaved elements from all of the source sequences.</returns>
         /// <remarks>
-        /// Interleave combines sequences by visiting each in turn, and returning the first element of each, followed
-        /// by the second, then the third, and so on. So, for example:<br/>
+        /// <para>
+        /// Interleave combines sequences by visiting each in turn, and returning the first element
+        /// of each, followed by the second, then the third, and so on. So, for example:</para>
         /// <code><![CDATA[
-        /// {1,1,1}.Interleave( {2,2,2}, {3,3,3} ) => { 1,2,3,1,2,3,1,2,3 }
+        /// var xs = new[] { 1, 1, 1 }.Interleave(new[] { 2, 2, 2 }, new[] { 3, 3, 3 });
+        /// // xs = { 1, 2, 3, 1, 2, 3, 1, 2, 3 }
         /// ]]></code>
-        /// This operator behaves in a deferred and streaming manner.<br/>
-        /// When sequences are of unequal length, this method will skip those sequences that have been fully consumed
-        /// and continue interleaving the remaining sequences.<br/>
-        /// The sequences are interleaved in the order that they appear in the <paramref name="otherSequences"/>
-        /// collection, with <paramref name="sequence"/> as the first sequence.
+        /// <para>
+        /// This operator behaves in a deferred and streaming manner.</para>
+        /// <para>
+        /// When sequences are of unequal length, this method will skip those sequences that have
+        /// been fully consumed and continue interleaving the remaining sequences.</para>
+        /// <para>
+        /// The sequences are interleaved in the order that they appear in the <paramref
+        /// name="otherSequences"/> collection, with <paramref name="sequence"/> as the first
+        /// sequence.</para>
         /// </remarks>
-        /// <typeparam name="T">The type of the elements of the source sequences</typeparam>
-        /// <param name="sequence">The first sequence in the interleave group</param>
-        /// <param name="otherSequences">The other sequences in the interleave group</param>
-        /// <returns>A sequence of interleaved elements from all of the source sequences</returns>
 
         public static IEnumerable<T> Interleave<T>(this IEnumerable<T> sequence, params IEnumerable<T>[] otherSequences)
         {

MoreLinq/Lag.cs

@@ -24,18 +24,26 @@ namespace MoreLinq
     public static partial class MoreEnumerable
     {
         /// <summary>
-        /// Produces a projection of a sequence by evaluating pairs of elements separated by a negative offset.
+        /// Produces a projection of a sequence by evaluating pairs of elements separated by a
+        /// negative offset.
         /// </summary>
+        /// <typeparam name="TSource">The type of the elements of the source sequence.</typeparam>
+        /// <typeparam name="TResult">The type of the elements of the result sequence.</typeparam>
+        /// <param name="source">The sequence over which to evaluate lag.</param>
+        /// <param name="offset">The offset (expressed as a positive number) by which to lag each
+        /// value of the sequence.</param>
+        /// <param name="resultSelector">A projection function which accepts the current and lagged
+        /// items (in that order) and returns a result.</param>
+        /// <returns>
+        /// A sequence produced by projecting each element of the sequence with its lagged
+        /// pairing.</returns>
         /// <remarks>
-        /// This operator evaluates in a deferred and streaming manner.<br/>
-        /// For elements prior to the lag offset, <c>default(T)</c> is used as the lagged value.<br/>
+        /// <para>
+        /// This operator evaluates in a deferred and streaming manner.</para>
+        /// <para>
+        /// For elements prior to the lag offset, <c>default(T)</c> is used as the lagged
+        /// value.</para>
         /// </remarks>
-        /// <typeparam name="TSource">The type of the elements of the source sequence</typeparam>
-        /// <typeparam name="TResult">The type of the elements of the result sequence</typeparam>
-        /// <param name="source">The sequence over which to evaluate lag</param>
-        /// <param name="offset">The offset (expressed as a positive number) by which to lag each value of the sequence</param>
-        /// <param name="resultSelector">A projection function which accepts the current and lagged items (in that order) and returns a result</param>
-        /// <returns>A sequence produced by projecting each element of the sequence with its lagged pairing</returns>
 
         public static IEnumerable<TResult> Lag<TSource, TResult>(this IEnumerable<TSource> source, int offset, Func<TSource, TSource?, TResult> resultSelector)
         {
@@ -47,18 +55,24 @@ public static IEnumerable<TResult> Lag<TSource, TResult>(this IEnumerable<TSourc
         }
 
         /// <summary>
-        /// Produces a projection of a sequence by evaluating pairs of elements separated by a negative offset.
+        /// Produces a projection of a sequence by evaluating pairs of elements separated by a
+        /// negative offset.
         /// </summary>
+        /// <typeparam name="TSource">The type of the elements of the source sequence.</typeparam>
+        /// <typeparam name="TResult">The type of the elements of the result sequence.</typeparam>
+        /// <param name="source">The sequence over which to evaluate lag.</param>
+        /// <param name="offset">The offset (expressed as a positive number) by which to lag each
+        /// value of the sequence.</param>
+        /// <param name="defaultLagValue">A default value supplied for the lagged value prior to the
+        /// lag offset.</param>
+        /// <param name="resultSelector">A projection function which accepts the current and lagged
+        /// items (in that order) and returns a result.</param>
+        /// <returns>
+        /// A sequence produced by projecting each element of the sequence with its lagged
+        /// pairing.</returns>
         /// <remarks>
-        /// This operator evaluates in a deferred and streaming manner.<br/>
+        /// This operator evaluates in a deferred and streaming manner.
         /// </remarks>
-        /// <typeparam name="TSource">The type of the elements of the source sequence</typeparam>
-        /// <typeparam name="TResult">The type of the elements of the result sequence</typeparam>
-        /// <param name="source">The sequence over which to evaluate lag</param>
-        /// <param name="offset">The offset (expressed as a positive number) by which to lag each value of the sequence</param>
-        /// <param name="defaultLagValue">A default value supplied for the lagged value prior to the lag offset</param>
-        /// <param name="resultSelector">A projection function which accepts the current and lagged items (in that order) and returns a result</param>
-        /// <returns>A sequence produced by projecting each element of the sequence with its lagged pairing</returns>
 
         public static IEnumerable<TResult> Lag<TSource, TResult>(this IEnumerable<TSource> source, int offset, TSource defaultLagValue, Func<TSource, TSource, TResult> resultSelector)
         {

MoreLinq/Lead.cs

@@ -24,19 +24,26 @@ namespace MoreLinq
     public static partial class MoreEnumerable
     {
         /// <summary>
-        /// Produces a projection of a sequence by evaluating pairs of elements separated by a positive offset.
+        /// Produces a projection of a sequence by evaluating pairs of elements separated by a
+        /// positive offset.
         /// </summary>
+        /// <typeparam name="TSource">The type of the elements in the source sequence.</typeparam>
+        /// <typeparam name="TResult">The type of the elements in the result sequence.</typeparam>
+        /// <param name="source">The sequence over which to evaluate lead.</param>
+        /// <param name="offset">The offset (expressed as a positive number) by which to lead each
+        /// element of the sequence.</param>
+        /// <param name="resultSelector">A projection function which accepts the current and
+        /// subsequent (lead) element (in that order) and produces a result.</param>
+        /// <returns>
+        /// A sequence produced by projecting each element of the sequence with its lead
+        /// pairing.</returns>
         /// <remarks>
-        /// This operator evaluates in a deferred and streaming manner.<br/>
-        /// For elements of the sequence that are less than <paramref name="offset"/> items from the end,
-        /// default(T) is used as the lead value.<br/>
+        /// <para>
+        /// This operator evaluates in a deferred and streaming manner.</para>
+        /// <para>
+        /// For elements of the sequence that are less than <paramref name="offset"/> items from the
+        /// end, <c>default(T)</c> is used as the lead value.</para>
         /// </remarks>
-        /// <typeparam name="TSource">The type of the elements in the source sequence</typeparam>
-        /// <typeparam name="TResult">The type of the elements in the result sequence</typeparam>
-        /// <param name="source">The sequence over which to evaluate Lead</param>
-        /// <param name="offset">The offset (expressed as a positive number) by which to lead each element of the sequence</param>
-        /// <param name="resultSelector">A projection function which accepts the current and subsequent (lead) element (in that order) and produces a result</param>
-        /// <returns>A sequence produced by projecting each element of the sequence with its lead pairing</returns>
 
         public static IEnumerable<TResult> Lead<TSource, TResult>(this IEnumerable<TSource> source, int offset, Func<TSource, TSource?, TResult> resultSelector)
         {
@@ -48,18 +55,24 @@ public static IEnumerable<TResult> Lead<TSource, TResult>(this IEnumerable<TSour
         }
 
         /// <summary>
-        /// Produces a projection of a sequence by evaluating pairs of elements separated by a positive offset.
+        /// Produces a projection of a sequence by evaluating pairs of elements separated by a
+        /// positive offset.
         /// </summary>
+        /// <typeparam name="TSource">The type of the elements in the source sequence.</typeparam>
+        /// <typeparam name="TResult">The type of the elements in the result sequence.</typeparam>
+        /// <param name="source">The sequence over which to evaluate Lead.</param>
+        /// <param name="offset">The offset (expressed as a positive number) by which to lead each
+        /// element of the sequence.</param>
+        /// <param name="defaultLeadValue">A default value supplied for the leading element when
+        /// none is available.</param>
+        /// <param name="resultSelector">A projection function which accepts the current and
+        /// subsequent (lead) element (in that order) and produces a result.</param>
+        /// <returns>
+        /// A sequence produced by projecting each element of the sequence with its lead
+        /// pairing.</returns>
         /// <remarks>
-        /// This operator evaluates in a deferred and streaming manner.<br/>
+        /// This operator evaluates in a deferred and streaming manner.
         /// </remarks>
-        /// <typeparam name="TSource">The type of the elements in the source sequence</typeparam>
-        /// <typeparam name="TResult">The type of the elements in the result sequence</typeparam>
-        /// <param name="source">The sequence over which to evaluate Lead</param>
-        /// <param name="offset">The offset (expressed as a positive number) by which to lead each element of the sequence</param>
-        /// <param name="defaultLeadValue">A default value supplied for the leading element when none is available</param>
-        /// <param name="resultSelector">A projection function which accepts the current and subsequent (lead) element (in that order) and produces a result</param>
-        /// <returns>A sequence produced by projecting each element of the sequence with its lead pairing</returns>
 
         public static IEnumerable<TResult> Lead<TSource, TResult>(this IEnumerable<TSource> source, int offset, TSource defaultLeadValue, Func<TSource, TSource, TResult> resultSelector)
         {

MoreLinq/Permutations.cs

@@ -180,17 +180,21 @@ IList<T> PermuteValueSet()
         /// <summary>
         /// Generates a sequence of lists that represent the permutations of the original sequence.
         /// </summary>
+        /// <typeparam name="T">The type of the elements in the sequence.</typeparam>
+        /// <param name="sequence">The original sequence to permute.</param>
+        /// <returns>
+        /// A sequence of lists representing permutations of the original sequence.</returns>
         /// <remarks>
-        /// A permutation is a unique re-ordering of the elements of the sequence.<br/>
+        /// <para>
+        /// A permutation is a unique re-ordering of the elements of the sequence.</para>
+        /// <para>
         /// This operator returns permutations in a deferred, streaming fashion; however, each
         /// permutation is materialized into a new list. There are N! permutations of a sequence,
-        /// where N => sequence.Count().<br/>
+        /// where N &#8658; <c>sequence.Count()</c>.</para>
+        /// <para>
         /// Be aware that the original sequence is considered one of the permutations and will be
-        /// returned as one of the results.
+        /// returned as one of the results.</para>
         /// </remarks>
-        /// <typeparam name="T">The type of the elements in the sequence</typeparam>
-        /// <param name="sequence">The original sequence to permute</param>
-        /// <returns>A sequence of lists representing permutations of the original sequence</returns>
 
         public static IEnumerable<IList<T>> Permutations<T>(this IEnumerable<T> sequence)
         {

MoreLinq/Slice.cs

@@ -24,20 +24,28 @@ namespace MoreLinq
     public static partial class MoreEnumerable
     {
         /// <summary>
-        /// Extracts a contiguous count of elements from a sequence at a particular zero-based starting index
+        /// Extracts a contiguous count of elements from a sequence at a particular zero-based
+        /// starting index.
         /// </summary>
+        /// <typeparam name="T">The type of the elements in the source sequence.</typeparam>
+        /// <param name="sequence">The sequence from which to extract elements.</param>
+        /// <param name="startIndex">The zero-based index at which to begin slicing.</param>
+        /// <param name="count">The number of items to slice out of the index.</param>
+        /// <returns>
+        /// A new sequence containing any elements sliced out from the source sequence.</returns>
         /// <remarks>
-        /// If the starting position or count specified result in slice extending past the end of the sequence,
-        /// it will return all elements up to that point. There is no guarantee that the resulting sequence will
-        /// contain the number of elements requested - it may have anywhere from 0 to <paramref name="count"/>.<br/>
-        /// This method is implemented in an optimized manner for any sequence implementing <c>IList{T}</c>.<br/>
-        /// The result of Slice() is identical to: <c>sequence.Skip(startIndex).Take(count)</c>
+        /// <para>
+        /// If the starting position or count specified result in slice extending past the end of
+        /// the sequence, it will return all elements up to that point. There is no guarantee that
+        /// the resulting sequence will contain the number of elements requested - it may have
+        /// anywhere from 0 to <paramref name="count"/>.</para>
+        /// <para>
+        /// This method is implemented in an optimized manner for any sequence implementing <see
+        /// cref="IList{T}"/>.</para>
+        /// <para>
+        /// The result of <see cref="Slice{T}"/> is identical to:
+        /// <c>sequence.Skip(startIndex).Take(count)</c></para>
         /// </remarks>
-        /// <typeparam name="T">The type of the elements in the source sequence</typeparam>
-        /// <param name="sequence">The sequence from which to extract elements</param>
-        /// <param name="startIndex">The zero-based index at which to begin slicing</param>
-        /// <param name="count">The number of items to slice out of the index</param>
-        /// <returns>A new sequence containing any elements sliced out from the source sequence</returns>
 
         public static IEnumerable<T> Slice<T>(this IEnumerable<T> sequence, int startIndex, int count)
         {