Fix various flake8 whitespace reports

$ flake8 | grep -E '(E203|E221|E226|E303|W291|W293)'
./run_unittests.py:1503:5: E303 too many blank lines (2)
./mesonbuild/interpreter.py:2342:64: E226 missing whitespace around arithmetic operator
./mesonbuild/minit.py:110:17: E221 multiple spaces before operator
./mesonbuild/minit.py:131:1: W293 blank line contains whitespace
./mesonbuild/minit.py:135:19: E221 multiple spaces before operator
./mesonbuild/minit.py:155:1: W293 blank line contains whitespace
./mesonbuild/minit.py:181:1: W293 blank line contains whitespace
./mesonbuild/minit.py:183:1: W293 blank line contains whitespace
./mesonbuild/minit.py:294:47: W291 trailing whitespace
./mesonbuild/minit.py:331:47: W291 trailing whitespace
./mesonbuild/modules/unstable_icestorm.py:49:1: W293 blank line contains whitespace
./mesonbuild/modules/unstable_icestorm.py:76:31: E203 whitespace before ':'
./mesonbuild/modules/unstable_icestorm.py:82:22: E203 whitespace before ':'

1 files changed, 3 insertions, 3 deletions

diff --git a/mesonbuild/modules/unstable_icestorm.py b/mesonbuild/modules/unstable_icestorm.py
index 761d583..c880bf5 100644
--- a/mesonbuild/modules/unstable_icestorm.py
+++ b/mesonbuild/modules/unstable_icestorm.py
@@ -46,7 +46,7 @@ class IceStormModule(ExtensionModule):
         all_sources = interpreter.source_strings_to_files(interpreter.flatten(arg_sources + kwarg_sources))
         if 'constraint_file' not in kwargs:
             raise mesonlib.MesonException('Constraint file not specified.')
-        
+
         constraint_file = interpreter.source_strings_to_files(kwargs['constraint_file'])
         if len(constraint_file) != 1:
             raise mesonlib.MesonException('Constraint file must contain one and only one entry.')
@@ -73,13 +73,13 @@ class IceStormModule(ExtensionModule):
             'input': asc_target,
             'output': bin_fname,
             'command': [self.icepack_bin, '@INPUT@', '@OUTPUT@'],
-            'build_by_default' : True})
+            'build_by_default': True})
 
         up_target = interpreter.func_run_target(None, [upload_name], {
             'command': [self.iceprog_bin, bin_target]})
 
         time_target = interpreter.func_run_target(None, [time_name], {
-            'command' : [self.icetime_bin, bin_target]})
+            'command': [self.icetime_bin, bin_target]})
 
 def initialize():
     return IceStormModule()