Test documentation typo fixes using codespell tool

Changes:
      - Fix typo in code documentation and test name

Tested: - Using codespell tool.

Change-Id: Ia1b65bddc01a4b1c103af9f2094d87da11c88953
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/ffdc/ffdc_collector.py b/ffdc/ffdc_collector.py
index b21044c..875ec81 100644
--- a/ffdc/ffdc_collector.py
+++ b/ffdc/ffdc_collector.py
@@ -792,7 +792,7 @@
 
         Description of argument(s):
         targ_dir_path                   The path of the directory to receive the files.
-        targ_file_prefix                Prefix which will be pre-pended to each
+        targ_file_prefix                Prefix which will be prepended to each
                                         target file's name.
         file_dict                       A dictionary of files to scp from targeted system to this system