Fixed self-assign warning in tests

Some of the tests were creating a variable `res`, however the test
system itself relies on it's own `res` variable. This worked out by
luck, but could lead to problems if the res variables were different
types.

Changed the generated variable in the test system to the less common
name `test`, which also works out to share the same prefix as other test
functions.

tests/template.fmt

@@ -58,7 +58,7 @@ lfs_size_t size;
 lfs_size_t wsize;
 lfs_size_t rsize;
 
-uintmax_t res;
+uintmax_t test;
 
 #ifndef LFS_READ_SIZE
 #define LFS_READ_SIZE 16

tests/test.py

@@ -14,8 +14,8 @@ def generate(test):
         match = re.match('(?: *\n)*( *)(.*)=>(.*);', line, re.DOTALL | re.MULTILINE)
         if match:
             tab, test, expect = match.groups()
-            lines.append(tab+'res = {test};'.format(test=test.strip()))
-            lines.append(tab+'test_assert("{name}", res, {expect});'.format(
+            lines.append(tab+'test = {test};'.format(test=test.strip()))
+            lines.append(tab+'test_assert("{name}", test, {expect});'.format(
                     name = re.match('\w*', test.strip()).group(),
                     expect = expect.strip()))
         else: