typo: indes -> indexes (#2179)

* typo: Double word "the"

* typo: indes -> indexes

Author: nschonni

xml/System.Collections.Immutable/IImmutableList`1.xml

@@ -164,7 +164,7 @@ For information on creating an `IImmutableList<T>` implementation, see <xref:Sys
       </Parameters>
       <Docs>
         <param name="item">The object to locate in the <see cref="T:System.Collections.Immutable.IImmutableList`1" />. This value can be null for reference types.</param>
-        <param name="index">The zero-based starting indes of the search. 0 (zero) is valid in an empty list.</param>
+        <param name="index">The zero-based starting indexes of the search. 0 (zero) is valid in an empty list.</param>
         <param name="count">The number of elements in the section to search.</param>
         <param name="equalityComparer">The equality comparer to use to locate <paramref name="item" />.</param>
         <summary>Searches for the specified object and returns the zero-based index of the first occurrence within the range of elements in the <see cref="T:System.Collections.Immutable.IImmutableList`1" /> that starts at the specified index and contains the specified number of elements.</summary>
@@ -455,7 +455,7 @@ For information on creating an `IImmutableList<T>` implementation, see <xref:Sys
       </Parameters>
       <Docs>
         <param name="oldValue">The element to be replaced.</param>
-        <param name="newValue">The element to replace the  the first occurrence of <paramref name="oldValue" /> with</param>
+        <param name="newValue">The element to replace the first occurrence of <paramref name="oldValue" /> with</param>
         <param name="equalityComparer">The equality comparer to use for matching <paramref name="oldValue" />.</param>
         <summary>Returns a new list with the first matching element in the list replaced with the specified element.</summary>
         <returns>A new list that contains <paramref name="newValue" />, even if <paramref name="oldvalue" /> is the same as <paramref name="newValue" />.</returns>