Remove redundant lines accordingly common format

Use spaces instead of tabs in the code snippet

Author: Morganov

book/B-embedding-git/sections/go-git.asc

@@ -21,7 +21,6 @@ r, err := git.PlainClone("/tmp/foo", false, &git.CloneOptions{
 
 As soon as you have a `Repository` instance, you can access information and perform mutations on it:
 
-
 [source, go]
 -----
 // retrieves the branch pointed by HEAD
@@ -39,7 +38,6 @@ for _, c := range history {
 }
 -----
 
-
 ==== Advanced Functionality
 
 go-git has few notable advanced features, one of which is a pluggable storage system, which is similar to Libgit2 backends.
@@ -63,13 +61,13 @@ Another advanced use-case includes a fine-tunable HTTP client, such as the one f
 [source, go]
 -----
 customClient := &http.Client{
-	Transport: &http.Transport{ // accept any certificate (might be useful for testing)
-		TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
-	},
-	Timeout: 15 * time.Second,  // 15 second timeout
-		CheckRedirect: func(req *http.Request, via []*http.Request) error {
-		return http.ErrUseLastResponse // don't follow redirect
-	},
+    Transport: &http.Transport{ // accept any certificate (might be useful for testing)
+        TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
+    },
+    Timeout: 15 * time.Second,  // 15 second timeout
+        CheckRedirect: func(req *http.Request, via []*http.Request) error {
+        return http.ErrUseLastResponse // don't follow redirect
+    },
 }
 
 // Override http(s) default protocol to use our custom client
@@ -79,7 +77,6 @@ client.InstallProtocol("https", githttp.NewClient(customClient))
 r, err := git.Clone(memory.NewStorage(), nil, &git.CloneOptions{URL: url})
 -----
 
-
 ==== Further Reading
 
 A full treatment of go-git's capabilities is outside the scope of this book.

book/B-embedding-git/sections/libgit2.asc

@@ -66,7 +66,7 @@ tree = commit.tree
 ----
 
 As you can see, the code is much less cluttered.
-Firstly, Rugged uses exceptions; it can raise things like `ConfigError` or `ObjectError`  to signal error conditions.
+Firstly, Rugged uses exceptions; it can raise things like `ConfigError` or `ObjectError` to signal error conditions.
 Secondly, there's no explicit freeing of resources, since Ruby is garbage-collected.
 Let's take a look at a slightly more complicated example: crafting a commit from scratch
 
@@ -108,7 +108,6 @@ commit = repo.lookup(commit_id) # <8>
 The Ruby code is nice and clean, but since Libgit2 is doing the heavy lifting, this code will run pretty fast, too.
 If you're not a rubyist, we touch on some other bindings in <<_libgit2_bindings>>.
 
-
 ==== Advanced Functionality
 
 Libgit2 has a couple of capabilities that are outside the scope of core Git.
@@ -187,7 +186,6 @@ Here we show a small example using a few of the more complete bindings packages
 The official collection of bindings can be found by browsing the repositories at https://github.com/libgit2[].
 The code we'll write will return the commit message from the commit eventually pointed to by HEAD (sort of like `git log -1`).
 
-
 ===== LibGit2Sharp
 
 (((.NET)))(((C#)))(((Mono)))
@@ -218,7 +216,6 @@ NSString *msg = [[[repo headReferenceWithError:NULL] resolvedTarget] message];
 
 Objective-git is fully interoperable with Swift, so don't fear if you've left Objective-C behind.
 
-
 ===== pygit2
 
 (((Python)))
@@ -233,7 +230,6 @@ pygit2.Repository("/path/to/repo") # open repository
     .message                       # read the message
 ----
 
-
 ==== Further Reading
 
 Of course, a full treatment of Libgit2's capabilities is outside the scope of this book.