More api work (#28581)

* StringBuilder.Equals: value to span

* BrotliStream.[?Begin]Read/Write[?Async](): 'array' to 'buffer'

Author: maryamariyan

src/System.IO.Compression.Brotli/ref/System.IO.Compression.Brotli.cs

@@ -39,13 +39,13 @@ protected override void Dispose(bool disposing) { }
         public override void Flush() { }
         public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) { throw null; }
         public override int EndRead(IAsyncResult asyncResult) { throw null; }
-        public override int Read(byte[] array, int offset, int count) { throw null; }
-        public override System.Threading.Tasks.Task<int> ReadAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
+        public override int Read(byte[] buffer, int offset, int count) { throw null; }
+        public override System.Threading.Tasks.Task<int> ReadAsync(byte[] buffer, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
         public override long Seek(long offset, System.IO.SeekOrigin origin) { throw null; }
         public override void SetLength(long value) { }
-        public override IAsyncResult BeginWrite(byte[] array, int offset, int count, AsyncCallback asyncCallback, object asyncState) { throw null; }
+        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) { throw null; }
         public override void EndWrite(IAsyncResult asyncResult) { }
-        public override void Write(byte[] array, int offset, int count) { }
-        public override System.Threading.Tasks.Task WriteAsync(byte[] array, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
+        public override void Write(byte[] buffer, int offset, int count) { }
+        public override System.Threading.Tasks.Task WriteAsync(byte[] buffer, int offset, int count, System.Threading.CancellationToken cancellationToken) { throw null; }
     }
 }

src/System.IO.Compression.Brotli/src/System/IO/Compression/dec/BrotliStream.Decompress.cs

@@ -74,10 +74,10 @@ public override IAsyncResult BeginRead(byte[] buffer, int offset, int count, Asy
         public override int EndRead(IAsyncResult asyncResult) =>
             TaskToApm.End<int>(asyncResult);
 
-        public override Task<int> ReadAsync(byte[] array, int offset, int count, CancellationToken cancellationToken)
+        public override Task<int> ReadAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
         {
-            ValidateParameters(array, offset, count);
-            return ReadAsync(new Memory<byte>(array, offset, count), cancellationToken).AsTask();
+            ValidateParameters(buffer, offset, count);
+            return ReadAsync(new Memory<byte>(buffer, offset, count), cancellationToken).AsTask();
         }
 
         public override ValueTask<int> ReadAsync(Memory<byte> buffer, CancellationToken cancellationToken = default(CancellationToken))

src/System.IO.Compression.Brotli/src/System/IO/Compression/enc/BrotliStream.Compress.cs

@@ -51,16 +51,16 @@ internal void WriteCore(ReadOnlySpan<byte> buffer, bool isFinalBlock = false)
             }
         }
 
-        public override IAsyncResult BeginWrite(byte[] array, int offset, int count, AsyncCallback asyncCallback, object asyncState) =>
-            TaskToApm.Begin(WriteAsync(array, offset, count, CancellationToken.None), asyncCallback, asyncState);
+        public override IAsyncResult BeginWrite(byte[] buffer, int offset, int count, AsyncCallback asyncCallback, object asyncState) =>
+            TaskToApm.Begin(WriteAsync(buffer, offset, count, CancellationToken.None), asyncCallback, asyncState);
 
         public override void EndWrite(IAsyncResult asyncResult) =>
             TaskToApm.End(asyncResult);
 
-        public override Task WriteAsync(byte[] array, int offset, int count, CancellationToken cancellationToken)
+        public override Task WriteAsync(byte[] buffer, int offset, int count, CancellationToken cancellationToken)
         {
-            ValidateParameters(array, offset, count);
-            return WriteAsync(new ReadOnlyMemory<byte>(array, offset, count), cancellationToken).AsTask();
+            ValidateParameters(buffer, offset, count);
+            return WriteAsync(new ReadOnlyMemory<byte>(buffer, offset, count), cancellationToken).AsTask();
         }
 
         public override ValueTask WriteAsync(ReadOnlyMemory<byte> buffer, CancellationToken cancellationToken = default(CancellationToken))

src/System.Runtime/ref/System.Runtime.cs

@@ -7562,7 +7562,7 @@ public StringBuilder(string value, int startIndex, int length, int capacity) { }
         public void CopyTo(int sourceIndex, char[] destination, int destinationIndex, int count) { }
         public void CopyTo(int sourceIndex, System.Span<char> destination, int count) { }
         public int EnsureCapacity(int capacity) { throw null; }
-        public bool Equals(System.ReadOnlySpan<char> value) { throw null; }
+        public bool Equals(System.ReadOnlySpan<char> span) { throw null; }
         public bool Equals(System.Text.StringBuilder sb) { throw null; }
         public System.Text.StringBuilder Insert(int index, bool value) { throw null; }
         public System.Text.StringBuilder Insert(int index, byte value) { throw null; }