pycodestyle: fix issues

When calling pycodestyle directly on a file (vs the project as a
whole) it seems to be a bit more opinionated.  Fix up these issues
so we can change how we call pycodestyle organization-wide.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: If561fb1ec3036b5fd5a600969fb5d81274464db2
diff --git a/bin/obmc_ser_num b/bin/obmc_ser_num
index 96fa7e0..ba620c8 100755
--- a/bin/obmc_ser_num
+++ b/bin/obmc_ser_num
@@ -22,9 +22,9 @@
 
 parser = argparse.ArgumentParser(
     usage='%(prog)s [OPTIONS]',
-    description="%(prog)s will get the system serial number from an OBMC" +
-                " machine and print it to stdout as follows:\n\n" +
-                "mch_ser_num:<ser num>",
+    description="%(prog)s will get the system serial number from an OBMC"
+    + " machine and print it to stdout as follows:\n\n"
+    + "mch_ser_num:<ser num>",
     formatter_class=argparse.ArgumentDefaultsHelpFormatter,
     prefix_chars='-+')
 
@@ -130,8 +130,8 @@
     try:
         mch_ser_num = json['data']['SerialNumber']
     except KeyError:
-        print_error_report("Failed to find 'SerialNumber' key in the" +
-                           " following data:\n" + sprint_var(json))
+        print_error_report("Failed to find 'SerialNumber' key in the"
+                           + " following data:\n" + sprint_var(json))
         return False
     print_var(mch_ser_num, 0, 0, 0)