test fstype: squash warnings

Author: scivision

+stdlib/+sys/filesystem_type.m

@@ -10,7 +10,7 @@
 elseif ismac()
   cmd = "df -aHY " + p + " | awk 'NR==2 {print $2}'";
 else
-  cmd = "df -T " + p + " | awk 'NR==2 {print $2}'";
+  cmd = "df --output=fstype " + p + " | tail -n 1";
 end
 
 [s, t] = system(cmd);

test/TestDisk.m

@@ -64,9 +64,9 @@ function test_filesystem_type(tc, Ps, fst_fun)
 t = fst_fun(Ps);
 tc.verifyClass(t, 'string')
 
-tc.assumeFalse(isempty(t) && tc.CI, "Some CI block viewing their filesystem type")
 
 if stdlib.exists(Ps)
+  tc.assumeFalse(isempty(t) && tc.CI, "Some CI block viewing their filesystem type")
   tc.verifyGreaterThan(strlength(t), 0)
 else
   tc.verifyEmpty(t)