Stop ignoring whitespace while testing.

Sometime back the output of glcpp started differing from the output of
"gcc -E" in the amount of whitespace in emitted. At the time, I
switched the test suite to use "diff -w" to ignore this. This was a
mistake since it ignores whitespace entirely. (I meant to use "diff
-b" which ignores only changes in the amount of whitespace.)

So bugs have since been introduced that the test suite doesn't
notice. For example, glcpp is producing "twotokens" where it should be
producing "two tokens".

Let's stop ignoring whitespace in the test suite, which currently
introduces lots of failures---some real and some spurious.

diff --git a/tests/glcpp-test b/tests/glcpp-test
index 673a4f45e96af735f98180447f87297bd22aa59f..25685eeabe5448bb0da76a882def22ccdbb6bac1 100755 (executable)
--- a/tests/glcpp-test
+++ b/tests/glcpp-test
@@ -5,5 +5,5 @@ for test in *.c; do
     ../glcpp < $test > $test.out
     gcc -E $test -o $test.gcc
     grep -v '^#' < $test.gcc > $test.expected
-    diff -B -w -u $test.expected $test.out
+    diff -u $test.expected $test.out
 done