File.OpenWrite doc improvements (#10822)

* remove redundant comments from the snippet

* fix the description

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Co-authored-by: Genevieve Warren <[email protected]>

Author: adamsitnik

snippets/csharp/System.IO/FileInfo/OpenWrite/file openwrite.cs

@@ -34,18 +34,5 @@ public static void Main()
     }
 }
 //This code produces output similar to the following;
-//results may vary based on the computer/file structure/etc.:
-//
 //This is to test the OpenWrite method.
-//
-//
-//
-//
-//
-//
-//
-//
-//
-//
-//
 // </Snippet1>

xml/System.IO/FileInfo.xml

@@ -2137,7 +2137,7 @@ The following example demonstrates moving a file to a different location and ren
           <format type="text/markdown"><![CDATA[
 
 ## Remarks
- The <xref:System.IO.FileInfo.OpenWrite%2A> method opens a file if one already exists for the file path, or creates a new file if one does not exist. For an existing file, it does not append the new text to the existing text. Instead, it overwrites the existing characters with the new characters. If you overwrite a longer string (such as "This is a test of the OpenWrite method") with a shorter string (like "Second run"), the file will contain a mix of the strings ("Second runtest of the OpenWrite method").
+ The <xref:System.IO.FileInfo.OpenWrite%2A> method opens a file if one already exists for the file path, or creates a new file if one does not exist. For an existing file, it does not append the new text to the existing text. Instead, it overwrites the existing characters with the new characters. If you overwrite a longer string (such as "This is a test of the OpenWrite method") with a shorter string (like "Second run"), the file will contain a mix of the strings ("Second run test of the OpenWrite method.").