Cleanup extraneous spaces on empty lines

tools/toolchains/arm.py

@@ -71,7 +71,7 @@ class ARM(mbedToolchain):
 
         ARM_BIN = join(TOOLCHAIN_PATHS['ARM'], "bin")
         ARM_INC = join(TOOLCHAIN_PATHS['ARM'], "include")
-        
+
         main_cc = join(ARM_BIN, "armcc")
 
         self.flags['common'] += ["--cpu=%s" % cpu]
@@ -155,7 +155,7 @@ class ARM(mbedToolchain):
         dir = join(dirname(object), '.temp')
         mkdir(dir)
         tempfile = join(dir, basename(object) + '.E.s')
-        
+
         # Build preprocess assemble command
         cmd_pre = self.asm
         cmd_pre.extend(self.get_compile_options(
@@ -168,7 +168,7 @@ class ARM(mbedToolchain):
         # Call cmdline hook
         cmd_pre = self.hook.get_cmdline_assembler(cmd_pre)
         cmd = self.hook.get_cmdline_assembler(cmd)
-       
+
         # Return command array, don't execute
         return [cmd_pre, cmd]
 
@@ -176,9 +176,9 @@ class ARM(mbedToolchain):
     def compile(self, cc, source, object, includes):
         # Build compile command
         cmd = cc + self.get_compile_options(self.get_symbols(), includes)
-        
+
         cmd.extend(self.get_dep_option(object))
-            
+
         cmd.extend(["-o", object, source])
 
         # Call cmdline hook