diff --git a/fuzzers/005-tilegrid/iob/top.py b/fuzzers/005-tilegrid/iob/top.py
index 285e084f..ccc8496f 100644
--- a/fuzzers/005-tilegrid/iob/top.py
+++ b/fuzzers/005-tilegrid/iob/top.py
@@ -49,25 +49,23 @@ module top(input wire [`N_DI-1:0] di);
     for idx, ((tile_name, site_name), isone) in enumerate(zip(
             sites, util.gen_fuzz_states(len(sites)))):
         params[tile_name] = (site_name, isone, "di[%u]" % idx)
-        print('''
+        print(
+            '''
     (* KEEP, DONT_TOUCH *)
     IBUF #(
     ) ibuf_{site_name} (
         .I(di[{idx}]),
         .O(di_buf[{idx}])
-        );'''.format(
-            site_name=site_name,
-            idx=idx))
+        );'''.format(site_name=site_name, idx=idx))
 
         if isone:
-            print('''
+            print(
+                '''
     (* KEEP, DONT_TOUCH *)
     PULLUP #(
     ) pullup_{site_name} (
         .O(di[{idx}])
-        );'''.format(
-            site_name=site_name,
-            idx=idx))
+        );'''.format(site_name=site_name, idx=idx))
 
     print("endmodule")
     write_params(params)
diff --git a/fuzzers/005-tilegrid/pll/top.py b/fuzzers/005-tilegrid/pll/top.py
index baeaf798..e5235d79 100644
--- a/fuzzers/005-tilegrid/pll/top.py
+++ b/fuzzers/005-tilegrid/pll/top.py
@@ -24,8 +24,7 @@ def write_params(params):
 
 
 def run():
-    print(
-        '''
+    print('''
 module top();
     ''')
 
@@ -42,9 +41,9 @@ module top();
     (* KEEP, DONT_TOUCH,  LOC = "{site_name}" *)
     PLLE2_ADV #( .STARTUP_WAIT({isone}) ) dut_{site_name} ();
 '''.format(
-        site_name=site_name,
-        isone=verilog.quote('TRUE' if isone else 'FALSE'),
-        ))
+                site_name=site_name,
+                isone=verilog.quote('TRUE' if isone else 'FALSE'),
+            ))
 
     print("endmodule")
     write_params(params)
diff --git a/prjxray/util.py b/prjxray/util.py
index 4bc6a711..0e27027a 100644
--- a/prjxray/util.py
+++ b/prjxray/util.py
@@ -238,19 +238,19 @@ def gen_fuzz_states(nvals):
     next_p2_states = 2**math.ceil(math.log(nvals, 2))
     n = next_p2_states
 
-    full_mask = 2**next_p2_states-1
+    full_mask = 2**next_p2_states - 1
 
     choices = []
     invert_choices = []
 
     num_or = 1
     while n > 0:
-        mask = 2**n-1
+        mask = 2**n - 1
 
         val = 0
 
         for offset in range(0, num_or, 2):
-            shift = offset*next_p2_states//num_or
+            shift = offset * next_p2_states // num_or
             val |= mask << shift
 
         choices.append(full_mask ^ val)