fix pep8 lint errors in the rest of the tools

no functional changes

Signed-off-by: Alexei Starovoitov <ast@fb.com>
diff --git a/tools/syncsnoop_example.txt b/tools/syncsnoop_example.txt
index 56cc21e..4425c5b 100644
--- a/tools/syncsnoop_example.txt
+++ b/tools/syncsnoop_example.txt
@@ -3,7 +3,7 @@
 
 This program traces calls to the kernel sync() routine, with basic timestamps:
 
-# ./syncsnoop 
+# ./syncsnoop
 TIME(s)            CALL
 16458148.611952    sync()
 16458151.533709    sync()