Added new section to print prev file

Author: LeoDaCoda

doc/source/quickstart.rst

@@ -168,6 +168,12 @@ Lets print the latest version of `<local_dir> dir1/file2.txt`
 
 Previous version of `<local_dir>/dir1/file2.txt`
 
+.. literalinclude:: ../../test/test_quick_doc.py
+        :language: python
+        :dedent: 8
+        :start-after: # [18.1-test_cloned_repo_object]
+        :end-before: # ![18.1-test_cloned_repo_object]
+
 * $ git status
 
     * Untracked files

test/test_quick_doc.py

@@ -177,21 +177,24 @@ def print_files_from_git(root, level=0):
         # Output <git.Blob "SHA1-HEX-HASH-1">
         # ![17-test_cloned_repo_object]
 
-        # print pre
-        # [17.1-test_cloned_repo_object]
-        commits_for_file = [c for c in repo.iter_commits(all=True, paths=print_file)]
-        blob = tree[print_file]
-
-        # ![17.1-test_cloned_repo_object]
-
+        # print latest file
         # [18-test_cloned_repo_object]
         blob = tree[print_file]
         print(blob.data_stream.read().decode())
 
         # Output
         # file 2 version 1
         # Update version 2
-
         # ![18-test_cloned_repo_object]
 
+        # print previous tree
+        # [18.1-test_cloned_repo_object]
+        commits_for_file = [c for c in repo.iter_commits(all=True, paths=print_file)]
+        tree = commits_for_file[-1].tree  # gets the first commit tree
+        blob = tree[print_file]
+
+        print(blob.data_stream.read().decode())
 
+        # Output
+        # file 2 version 1
+        # ![18.1-test_cloned_repo_object]