Fix common code in line with standard coding expectation

Changes fix for the following:

Line has trailing whitespace (TrailingWhitespace)
Too many trailing blank lines (TrailingBlankLines)
Line is too long (exceeds 110 characters) (LineTooLong)

Change-Id: I4809ef67ae539f9f140fe0b2282620acc68dc8ba
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/bmc_network_utils.robot b/lib/bmc_network_utils.robot
index 7a42a22..efe6998 100644
--- a/lib/bmc_network_utils.robot
+++ b/lib/bmc_network_utils.robot
@@ -452,7 +452,7 @@
 
     # Description of argument(s):
     # network_active_channel   Ethernet channel number (eg. 1 or 2)
-    
+
     ${active_channel_config}=  Get Active Channel Config
     ${resp}=  Redfish.Get
     ...  ${REDFISH_NW_ETH_IFACE}${active_channel_config['${network_active_channel}']['name']}