Use spaces instead of tabs

The is more common in python and follows other rules usage.

thefuck/rules/javac.py

@@ -1,15 +1,15 @@
 # Appends .java when compiling java files
-# 
+#
 # Example:
 # > javac foo
-# error: Class names, 'foo', are only accepted if annotation 
+# error: Class names, 'foo', are only accepted if annotation
 # processing is explicitly requested
-#
-# 
+ 
 
 def match(command, settings):
-	return (command.script.startswith ('javac ')
-			and not command.script.endswith('.java'))
+    return (command.script.startswith('javac ')
+            and not command.script.endswith('.java'))
+
 
 def get_new_command(command, settings):
-	return command.script + '.java'
+    return command.script + '.java'