Fix LINQ group by syntax documentation to show complete syntax (#47974)

* Initial plan

* Fix LINQ group by syntax documentation to show complete syntax

Co-authored-by: BillWagner <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: BillWagner <[email protected]>

Author: Copilot

docs/csharp/linq/standard-query-operators/grouping-data.md

@@ -15,7 +15,7 @@ The standard query operator methods that group data elements are listed in the f
 
 |Method Name|Description|C# Query Expression Syntax|More Information|
 |-----------------|-----------------|---------------------------------|----------------------|
-|GroupBy|Groups elements that share a common attribute. An <xref:System.Linq.IGrouping%602> object represents each group.|`group … by`<br /><br /> -or-<br /><br /> `group … by … into …`|<xref:System.Linq.Enumerable.GroupBy%2A?displayProperty=nameWithType><br /><br /> <xref:System.Linq.Queryable.GroupBy%2A?displayProperty=nameWithType>|
+|GroupBy|Groups elements that share a common attribute. An <xref:System.Linq.IGrouping%602> object represents each group.|`group … by …`<br /><br /> -or-<br /><br /> `group … by … into …`|<xref:System.Linq.Enumerable.GroupBy%2A?displayProperty=nameWithType><br /><br /> <xref:System.Linq.Queryable.GroupBy%2A?displayProperty=nameWithType>|
 |ToLookup|Inserts elements into a <xref:System.Linq.Lookup%602> (a one-to-many dictionary) based on a key selector function.|Not applicable.|<xref:System.Linq.Enumerable.ToLookup%2A?displayProperty=nameWithType>|
 
 The following code example uses the `group by` clause to group integers in a list according to whether they're even or odd.

docs/csharp/linq/standard-query-operators/index.md

@@ -59,7 +59,7 @@ The following table lists the standard query operators that have equivalent quer
 | Method | C# query expression syntax |
 |------------|---------------------------------|
 |<xref:System.Linq.Enumerable.Cast%2A>|Use an explicitly typed range variable:<br /><br /> `from int i in numbers`<br /><br /> (For more information, see [from clause](../../language-reference/keywords/from-clause.md).)|
-|<xref:System.Linq.Enumerable.GroupBy%2A>|`group … by`<br /><br /> -or-<br /><br /> `group … by … into …`<br /><br /> (For more information, see [group clause](../../language-reference/keywords/group-clause.md).)|
+|<xref:System.Linq.Enumerable.GroupBy%2A>|`group … by …`<br /><br /> -or-<br /><br /> `group … by … into …`<br /><br /> (For more information, see [group clause](../../language-reference/keywords/group-clause.md).)|
 |<xref:System.Linq.Enumerable.GroupJoin%60%604%28System.Collections.Generic.IEnumerable%7B%60%600%7D%2CSystem.Collections.Generic.IEnumerable%7B%60%601%7D%2CSystem.Func%7B%60%600%2C%60%602%7D%2CSystem.Func%7B%60%601%2C%60%602%7D%2CSystem.Func%7B%60%600%2CSystem.Collections.Generic.IEnumerable%7B%60%601%7D%2C%60%603%7D%29>|`join … in … on … equals … into …`<br /><br /> (For more information, see [join clause](../../language-reference/keywords/join-clause.md).)|
 |<xref:System.Linq.Enumerable.Join%60%604%28System.Collections.Generic.IEnumerable%7B%60%600%7D%2CSystem.Collections.Generic.IEnumerable%7B%60%601%7D%2CSystem.Func%7B%60%600%2C%60%602%7D%2CSystem.Func%7B%60%601%2C%60%602%7D%2CSystem.Func%7B%60%600%2C%60%601%2C%60%603%7D%29>|`join … in … on … equals …`<br /><br /> (For more information, see [join clause](../../language-reference/keywords/join-clause.md).)|
 |<xref:System.Linq.Enumerable.OrderBy%60%602%28System.Collections.Generic.IEnumerable%7B%60%600%7D%2CSystem.Func%7B%60%600%2C%60%601%7D%29>|`orderby`<br /><br /> (For more information, see [orderby clause](../../language-reference/keywords/orderby-clause.md).)|