Minor whitespace fixes that make the markdown output make more sense

(but try to preserve aesthetics as a plain text file).

README.md

@@ -70,6 +70,7 @@ flags for 'extreme best case' optimizations but they must be
 explicitly activated.
 
 These flags include:
+
     -Z, --zerocopy            use a 'zero copy' sendfile() method of sending data
     -A, --affinity n/n,m      set CPU affinity
 
@@ -97,8 +98,9 @@ New options:
     -L, --flowlabel           set IPv6 flow label (Linux only)
 
 Changed flags:
+
     -C, --linux-congestion    set congestion control algorithm (Linux only)
-      			    (-Z in iperf2.0)
+                              (-Z in iperf2)
 
 
 Deprecated options: