Mention default HttpCompletionOption value in remarks (#8469)

Author: rzikm

xml/System.Net.Http/HttpClient.xml

@@ -995,7 +995,7 @@ The <paramref name="requestUri" /> is not an absolute URI.
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read.  
+ This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read. The behavior is the same as if <xref:System.Net.Http.HttpCompletionOption.ResponseContentRead> has been explicitly specified.
 
 > [!NOTE]
 > In case of timeout, different exceptions are thrown on different .NET implementations.
@@ -1050,7 +1050,7 @@ The <paramref name="requestUri" /> is not an absolute URI.
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read.  
+ This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read. The behavior is the same as if <xref:System.Net.Http.HttpCompletionOption.ResponseContentRead> has been explicitly specified.
 
 > [!NOTE]
 > In case of timeout, different exceptions are thrown on different .NET implementations.
@@ -1177,7 +1177,7 @@ The <paramref name="requestUri" /> is not an absolute URI.
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read.  
+ This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read. The behavior is the same as if <xref:System.Net.Http.HttpCompletionOption.ResponseContentRead> has been explicitly specified.
 
 > [!NOTE]
 > In case of timeout, different exceptions are thrown on different .NET implementations.
@@ -1290,7 +1290,7 @@ The <paramref name="requestUri" /> is not an absolute URI.
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read.  
+ This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete after the whole response (including content) is read. The behavior is the same as if <xref:System.Net.Http.HttpCompletionOption.ResponseContentRead> has been explicitly specified.
 
 > [!NOTE]
 > In case of timeout, different exceptions are thrown on different .NET implementations.
@@ -3224,7 +3224,7 @@ The custom <see cref="T:System.Net.Http.HttpMessageHandler" /> does not override
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete once the entire response including content is read.  
+ This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete once the entire response including content is read. The behavior is the same as if <xref:System.Net.Http.HttpCompletionOption.ResponseContentRead> has been explicitly specified.
 
 > [!NOTE]
 > In case of timeout, different exceptions are thrown on different .NET implementations.
@@ -3336,7 +3336,7 @@ The custom <see cref="T:System.Net.Http.HttpMessageHandler" /> does not override
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete once the entire response including content is read.  
+ This operation will not block. The returned <xref:System.Threading.Tasks.Task%601> object will complete once the entire response including content is read. The behavior is the same as if <xref:System.Net.Http.HttpCompletionOption.ResponseContentRead> has been explicitly specified.
 
 > [!NOTE]
 > In case of timeout, different exceptions are thrown on different .NET implementations.