Update README

README

@@ -5,30 +5,30 @@ It takes two automata as input, presented the format described here:
     http://languageinclusion.org/doku.php?id=tools#the_ba_format
 Let us call the first given automaton A and B the second one.
 Upon termination, FORKLIFT exit code is:
-	0 if L(A) is subset of L(B)
-	1 if L(A) is NOT subset of L(B)
-	127 when the inclusion have not been computed
+    0 if L(A) is subset of L(B)
+    1 if L(A) is NOT subset of L(B)
+    127 when the inclusion have not been computed
 
 
 ### COMPILATION ###
 
 The compilation is performed thanks to the command:
-	make
+    make
 Note that, the makefile will simply call another one located in the folder `program`.
 The slave makefile will:
-	compile the source code (using `javac`)
-	then construct the java archive (using `jar`)
-	and finally print the usage of FORKLIFT
+    compile the source code (using `javac`)
+    then construct the java archive (using `jar`)
+    and finally print the usage of FORKLIFT
 
 
 ### RUNNING ###
 
 To run FORKLIFT without options execute the command:
-	java -jar forklift.jar sub.ba sup.ba
+    java -jar forklift.jar sub.ba sup.ba
 where both `sub.ba` and `sup.ba` encode some Büchi automaton.
 Please find several encoding of Büchi automata in the folder `samples`.
 For intance running 
-	java -jar forklift.jar ./samples/example_SUPERSET.ba ./samples/example_SUBSET.ba
+    java -jar forklift.jar ./samples/example_SUPERSET.ba ./samples/example_SUBSET.ba
 checks whether L(A) is included in L(B) where A and B are given in Fig.1 in the paper.
 Since this inclusion does not holds, FORKLIFT provides an non-inclusion witness `u cycle {v}`.
 
@@ -37,9 +37,9 @@ Since this inclusion does not holds, FORKLIFT provides an non-inclusion witness
 
 Options can be inserted anywhere after `forklift.jar` in the run command.
 For intance running
-	java -jar forklift.jar -t ./samples/example_SUPERSET.ba -o ./samples/example_SUBSET.ba -v
+    java -jar forklift.jar -t ./samples/example_SUPERSET.ba -o ./samples/example_SUBSET.ba -v
 enables the options `optimization`, the option `verbose` and the option `time`.
 For further information about options use the command:
-	java -jar forklift.jar -h
+    java -jar forklift.jar -h