Spelling and grammar cleanup (#1391)

src/Microsoft.AspNetCore.Authentication.OAuth/Claims/ClaimAction.cs

@@ -31,10 +31,10 @@ namespace Microsoft.AspNetCore.Authentication.OAuth.Claims
         public string ValueType { get; }
 
         /// <summary>
-        /// Exhamine the given userData json, determine if the requisite data is present, and optionally add it
+        /// Examine the given userData json, determine if the requisite data is present, and optionally add it
         /// as a new Claim on the ClaimsIdentity.
         /// </summary>
-        /// <param name="userData">The source data to exhamine. This value may be null.</param>
+        /// <param name="userData">The source data to examine. This value may be null.</param>
         /// <param name="identity">The identity to add Claims to.</param>
         /// <param name="issuer">The value to use for Claim.Issuer when creating a Claim.</param>
         public abstract void Run(JObject userData, ClaimsIdentity identity, string issuer);

src/Microsoft.AspNetCore.Authorization/DefaultAuthorizationService.cs

@@ -30,7 +30,7 @@ namespace Microsoft.AspNetCore.Authorization
         /// <param name="handlers">The handlers used to fulfill <see cref="IAuthorizationRequirement"/>s.</param>
         /// <param name="logger">The logger used to log messages, warnings and errors.</param>  
         /// <param name="contextFactory">The <see cref="IAuthorizationHandlerContextFactory"/> used to create the context to handle the authorization.</param>  
-        /// <param name="evaluator">The <see cref="IAuthorizationEvaluator"/> used to determine if authorzation was successful.</param>  
+        /// <param name="evaluator">The <see cref="IAuthorizationEvaluator"/> used to determine if authorization was successful.</param>  
         /// <param name="options">The <see cref="AuthorizationOptions"/> used.</param>  
         public DefaultAuthorizationService(IAuthorizationPolicyProvider policyProvider, IAuthorizationHandlerProvider handlers, ILogger<DefaultAuthorizationService> logger, IAuthorizationHandlerContextFactory contextFactory, IAuthorizationEvaluator evaluator, IOptions<AuthorizationOptions> options)
         {
@@ -74,7 +74,7 @@ namespace Microsoft.AspNetCore.Authorization
         /// <param name="resource">The resource to evaluate the requirements against.</param>
         /// <param name="requirements">The requirements to evaluate.</param>
         /// <returns>
-        /// A flag indicating whether authorization has succeded.
+        /// A flag indicating whether authorization has succeeded.
         /// This value is <value>true</value> when the user fulfills the policy otherwise <value>false</value>.
         /// </returns>
         public async Task<AuthorizationResult> AuthorizeAsync(ClaimsPrincipal user, object resource, IEnumerable<IAuthorizationRequirement> requirements)
@@ -136,7 +136,7 @@ namespace Microsoft.AspNetCore.Authorization
         /// <param name="resource">The resource the policy should be checked with.</param>
         /// <param name="policyName">The name of the policy to check against a specific context.</param>
         /// <returns>
-        /// A flag indicating whether authorization has succeded.
+        /// A flag indicating whether authorization has succeeded.
         /// This value is <value>true</value> when the user fulfills the policy otherwise <value>false</value>.
         /// </returns>
         public async Task<AuthorizationResult> AuthorizeAsync(ClaimsPrincipal user, object resource, string policyName)

src/Microsoft.AspNetCore.Authorization/IAuthorizationService.cs

@@ -43,7 +43,7 @@ namespace Microsoft.AspNetCore.Authorization
         /// <returns>
         /// A flag indicating whether authorization has succeeded.
         /// Returns a flag indicating whether the user, and optional resource has fulfilled the policy.    
-        /// <value>true</value> when the the policy has been fulfilled; otherwise <value>false</value>.
+        /// <value>true</value> when the policy has been fulfilled; otherwise <value>false</value>.
         /// </returns>
         /// <remarks>
         /// Resource is an optional parameter and may be null. Please ensure that you check it is not 

src/Microsoft.AspNetCore.Authorization/Infrastructure/PassThroughAuthorizationHandler.cs

@@ -7,7 +7,7 @@ using System.Threading.Tasks;
 namespace Microsoft.AspNetCore.Authorization.Infrastructure
 {
     /// <summary>
-    /// Infrastructre class which allows an <see cref="IAuthorizationRequirement"/> to
+    /// Infrastructure class which allows an <see cref="IAuthorizationRequirement"/> to
     /// be its own <see cref="IAuthorizationHandler"/>.
     /// </summary>
     public class PassThroughAuthorizationHandler : IAuthorizationHandler