Fix font weight formatting in OVERVIEW.md

Author: Gurpartap

OVERVIEW.md

@@ -3,42 +3,42 @@
 This document will provide an overview of the gRPC API for Swift.
 It follows a standard form used by each language-platform implementation.
 
-##Basic Functionality
+## Basic Functionality
 
 The following examples use [echo.proto](Examples/Echo/echo.proto) to demonstrate
 basic gRPC operation and generated code.
 
-###How is a New Stub Created?
+### How is a New Stub Created?
 
 Swift gRPC client and server code is generated by the `protoc-gen-swiftgrpc` plugin.
 The plugin is called from `protoc` and can be invoked for `echo.proto` like this:
 
     protoc Examples/Echo/echo.proto --proto_path=Examples/Echo --swiftgrpc_out=. 
 
-###Simple Request-Response RPC: Client-side RPC
+### Simple Request-Response RPC: Client-side RPC
 
     var requestMessage = Echo_EchoRequest(text:message)
     print("Sending: " + requestMessage.text)
     let responseMessage = try service.get(requestMessage)
     print("get received: " + responseMessage.text)
 
-###Simple Request-Response RPC: Server Implementation of RPC
+### Simple Request-Response RPC: Server Implementation of RPC
 
     // get returns requests as they were received.
     func get(request : Echo_EchoRequest) throws -> Echo_EchoResponse {
       return Echo_EchoResponse(text:"Swift echo get: " + request.text)
     }
 
-###Show how Client does two RPCs sequentially 
+### Show how Client does two RPCs sequentially 
 
 
-###Show how Client does two RPCs asynchronously
+### Show how Client does two RPCs asynchronously
 
 
-###Any code for handling incoming RPC on server that might need to be written
+### Any code for handling incoming RPC on server that might need to be written
 
 
-###Server Streaming RPC: Client-side code
+### Server Streaming RPC: Client-side code
 
     let requestMessage = Echo_EchoRequest(text:message)
     print("Sending: " + requestMessage.text)
@@ -54,7 +54,7 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
       }
     }
 
-###Server Streaming RPC: Server-side code
+### Server Streaming RPC: Server-side code
 
     // expand splits a request into words and returns each word in a separate message.
     func expand(request : Echo_EchoRequest, session : Echo_EchoExpandSession) throws -> Void {
@@ -67,7 +67,7 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
       }
     }
 
-###How is a Server Created?
+### How is a Server Created?
 
     var done = NSCondition()
     let echoProvider = EchoProvider()
@@ -92,13 +92,13 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
     done.wait()
     done.unlock()
 
-##Advanced
+## Advanced
 
-###RPC canceling on client side
+### RPC canceling on client side
 
-###Code to look for and handle cancelled RPC on Server side
+### Code to look for and handle cancelled RPC on Server side
 
-###Client Streaming RPC: Client-side code
+### Client Streaming RPC: Client-side code
 
     let collectCall = try service.collect()
     let parts = message.components(separatedBy:" ")
@@ -110,7 +110,7 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
     }
     let responseMessage = try collectCall.CloseAndReceive()
 
-###Client Streaming RPC: Server-side code
+### Client Streaming RPC: Server-side code
 
     // collect collects a sequence of messages and returns them concatenated when the caller closes.
     func collect(session : Echo_EchoCollectSession) throws -> Void {
@@ -129,11 +129,11 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
       try session.SendAndClose(response)
     }
 
-###Flow control interactions while sending & receiving messages
+### Flow control interactions while sending & receiving messages
 
-###Flow control and buffer pool : Control API
+### Flow control and buffer pool : Control API
 
-###Bi Directional Streaming : Client-side code
+### Bi Directional Streaming : Client-side code
 
     var done = NSCondition()
     let updateCall = try service.update()
@@ -167,7 +167,7 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
     done.wait()
     done.unlock()
 
-###Bi Directional Streaming : Server-side code
+### Bi Directional Streaming : Server-side code
 
     // update streams back messages as they are received in an input stream.
     func update(session : Echo_EchoUpdateSession) throws -> Void {
@@ -186,4 +186,4 @@ The plugin is called from `protoc` and can be invoked for `echo.proto` like this
       try session.Close()
     }
 
-###Any stub deletion/cleanup code needed
+### Any stub deletion/cleanup code needed