Remove useless parenthesis when generating lustre code.

test/lus2lic.sum

 ==> lus2lic0.sum <==
-Test run by jahier on Fri Jun  9 11:12:07 
+Test run by jahier on Thu Nov 16 10:59:20 
 Native configuration is x86_64-pc-linux-gnu
 
 		=== lus2lic0 tests ===
@@ -66,7 +66,7 @@ XFAIL: Test bad programs (assert): test_lus2lic_no_node should_fail/assert/lecte
 XFAIL: Test bad programs (assert): test_lus2lic_no_node should_fail/assert/s.lus
 
 ==> lus2lic1.sum <==
-Test run by jahier on Fri Jun  9 11:12:08 
+Test run by jahier on Thu Nov 16 10:59:21 
 Native configuration is x86_64-pc-linux-gnu
 
 		=== lus2lic1 tests ===
@@ -631,7 +631,7 @@ PASS: /home/jahier/lus2lic/test/../utils/compare_exec_and_2c multipar.lus  {}
 PASS: /home/jahier/lus2lic/test/../utils/compare_lv6_and_lv6_en multipar.lus {}
 
 ==> lus2lic2.sum <==
-Test run by jahier on Fri Jun  9 11:18:33 
+Test run by jahier on Thu Nov 16 11:03:23 
 Native configuration is x86_64-pc-linux-gnu
 
 		=== lus2lic2 tests ===
@@ -1177,7 +1177,7 @@ PASS: /home/jahier/lus2lic/test/../utils/compare_lv6_and_lv6_en zzz2.lus {}
 PASS: /home/jahier/lus2lic/test/../utils/compare_gcc_and_clang zzz2.lus {}
 
 ==> lus2lic3.sum <==
-Test run by jahier on Fri Jun  9 11:25:06 
+Test run by jahier on Thu Nov 16 11:08:02 
 Native configuration is x86_64-pc-linux-gnu
 
 		=== lus2lic3 tests ===
@@ -1696,7 +1696,7 @@ PASS: /home/jahier/lus2lic/test/../utils/test_lus2lic_no_node multipar.lus {}
 
 
 ==> lus2lic4.sum <==
-Test run by jahier on Fri Jun  9 11:26:26 
+Test run by jahier on Thu Nov 16 11:09:02 
 Native configuration is x86_64-pc-linux-gnu
 
 		=== lus2lic4 tests ===
@@ -2224,11 +2224,11 @@ PASS: /home/jahier/lus2lic/test/../utils/compare_gcc_and_clang multipar.lus {}
 ===============================
 # Total number of failures: 17
 lus2lic0.log:testcase ./lus2lic.tests/test0.exp completed in 1 seconds
-lus2lic1.log:testcase ./lus2lic.tests/test1.exp completed in 384 seconds
-lus2lic2.log:testcase ./lus2lic.tests/test2.exp completed in 393 seconds
-lus2lic3.log:testcase ./lus2lic.tests/test3.exp completed in 80 seconds
-lus2lic4.log:testcase ./lus2lic.tests/test4.exp completed in 60 seconds
+lus2lic1.log:testcase ./lus2lic.tests/test1.exp completed in 242 seconds
+lus2lic2.log:testcase ./lus2lic.tests/test2.exp completed in 279 seconds
+lus2lic3.log:testcase ./lus2lic.tests/test3.exp completed in 59 seconds
+lus2lic4.log:testcase ./lus2lic.tests/test4.exp completed in 54 seconds
 * Ref time: 
-319.27user 101.87system 15:18.45elapsed 45%CPU (0avgtext+0avgdata 99844maxresident)k
-0inputs+485232outputs (10major+21278977minor)pagefaults 0swaps
+234.95user 69.31system 10:36.64elapsed 47%CPU (0avgtext+0avgdata 98196maxresident)k
+72inputs+584520outputs (14major+20959185minor)pagefaults 0swaps
 * Quick time (-j 4):