Travis CI build to check compliance with PEP8 (#987)

* Travis CI build to check compliance with PEP8

* argdist: linter cleanup

* dbslower: linter cleanup

* dbstat: linter cleanup

* memleak: linter cleanup

* syscount: linter cleanup

* tplist: linter cleanup

* trace: linter cleanup

* ucalls: linter cleanup

* uflow: linter cleanup

* ugc: linter cleanup

* uobjnew: linter cleanup

* ustat: linter cleanup
diff --git a/tools/ucalls.py b/tools/ucalls.py
index b6cbdb5..9acb008 100755
--- a/tools/ucalls.py
+++ b/tools/ucalls.py
@@ -257,7 +257,8 @@
                            bpf["systimes"].items())
             data.extend(syscalls)
         else:
-            syscalls = map(lambda kv: (bpf.ksym(kv[0].value), (kv[1].value, 0)),
+            syscalls = map(lambda kv: (bpf.ksym(kv[0].value),
+                                       (kv[1].value, 0)),
                            bpf["syscounts"].items())
             data.extend(syscalls)
 
@@ -294,8 +295,8 @@
         data = data[-args.top:]
     for key, value in data:
         if args.latency:
-            time = value[1]/1000000.0 if args.milliseconds else \
-                   value[1]/1000.0
+            time = value[1] / 1000000.0 if args.milliseconds else \
+                   value[1] / 1000.0
             print("%-50s %8d %6.2f" % (key, value[0], time))
         else:
             print("%-50s %8d" % (key, value[0]))