clean-up trailing whitespace (#453)

These changes have been mostly auto-generated with:

	find . -type f -print0 | xargs -0 perl -pi -e 's/ +$//'

Signed-off-by: Radostin Stoyanov <rstoyanov@fedoraproject.org>

utils/cheat_sheet_src/src/architecture.txt

@@ -3,7 +3,7 @@ extern void truncate(in bit<32> length);
 extern void resubmit<T>(in T x);
 extern void recirculate<T>(in T x);
 enum CloneType { I2E, E2I }
-extern void clone(in CloneType type, 
+extern void clone(in CloneType type,
                   in bit<32> session);
 
 // v1model pipeline elements
@@ -26,7 +26,7 @@ control Egress<H, M>(
   inout H hdr,
   inout M meta,
   inout standard_metadata_t std_meta
-);                      
+);
 control ComputeChecksum<H, M>(
   inout H hdr,
   inout M meta

utils/cheat_sheet_src/src/tables.txt

@@ -1,7 +1,7 @@
 table ipv4_lpm {
   key = {
     hdr.ipv4.dstAddr : lpm;
-    // standard match kinds: 
+    // standard match kinds:
     // exact, ternary, lpm
   }
   // actions that can be invoked