Format Readme.md code blocks as Go code

README.md

@@ -51,20 +51,20 @@ First use go get to install the latest version of the library.
     $ go get github.com/spf13/afero
 
 Next include Afero in your application.
-
+```go
 import "github.com/spf13/afero"
-
+```
 
 ## Step 2: Declare a backend
 
 First define a package variable and set it to a pointer to a filesystem.
-
+```go
 var AppFs afero.Fs = &afero.MemMapFs{}
 
 or
 
 var AppFs afero.Fs = &afero.OsFs{}
-
+```
 It is important to note that if you repeat the composite literal you
 will be using a completely new and isolated filesystem. In the case of
 OsFs it will still use the same underlying filesystem but will reduce
@@ -76,9 +76,9 @@ Throughout your application use any function and method like you normally
 would.
 
 So if my application before had:
-
+```go
 os.Open('/tmp/foo')
-
+```
 We would replace it with a call to `AppFs.Open('/tmp/foo')`.
 
 `AppFs` being the variable we defined above.
@@ -87,7 +87,7 @@ We would replace it with a call to `AppFs.Open('/tmp/foo')`.
 ## List of all available functions
 
 File System Methods Available:
-
+```go
 Chmod(name string, mode os.FileMode) : error
 Chtimes(name string, atime time.Time, mtime time.Time) : error
 Create(name string) : File, error
@@ -100,9 +100,9 @@ File System Methods Available:
 RemoveAll(path string) : error
 Rename(oldname, newname string) : error
 Stat(name string) : os.FileInfo, error
-
+```
 File Interfaces and Methods Available:
-
+```go
 io.Closer
 io.Reader
 io.ReaderAt
@@ -117,7 +117,7 @@ File Interfaces and Methods Available:
 Sync() : error
 Truncate(size int64) : error
 WriteString(s string) : ret int, err error
-
+```
 In some applications it may make sense to define a new package that
 simply exports the file system variable for easy access from anywhere.
 
@@ -146,7 +146,7 @@ appropriate in my application code. This approach ensures that Tests are order
 independent, with no test relying on the state left by an earlier test.
 
 Then in my tests I would initialize a new MemMapFs for each test:
-
+```go
 func TestExist(t *testing.T) {
 	appFS = &afero.MemMapFs{}
 	// create test files and directories
@@ -170,7 +170,7 @@ Then in my tests I would initialize a new MemMapFs for each test:
     	}
 	}
 }
-
+```
 
 ## Using Afero with Http
 
@@ -182,11 +182,11 @@ returns an http.File type.
 
 Afero provides an httpFs file system which satisfies this requirement.
 Any Afero FileSystem can be used as an httpFs.
-
+```go
 httpFs := &afero.HttpFs{SourceFs: <ExistingFS>}
 fileserver := http.FileServer(httpFs.Dir(<PATH>)))
 http.Handle("/", fileserver)
-
+```
 # Available Backends
 
 ## OsFs