Test --help=common for full sentences

The portion of help.exp that checks that help output contains full
sentences failed to cover common options.


for  gcc/testsuite/ChangeLog

	* gcc.misc-tests/help.exp: Test --help=common for full sentences.

From-SVN: r277686

gcc/testsuite/ChangeLog

+2019-10-31  Alexandre Oliva <oliva@adacore.com>
+
+	* gcc.misc-tests/help.exp: Test --help=common for full sentences.
+
 2019-10-31  Jakub Jelinek  <jakub@redhat.com>
 
 	PR preprocessor/92296

gcc/testsuite/gcc.misc-tests/help.exp

@@ -146,8 +146,7 @@ check_for_options c "--help=joined,undocumented" "" "" ""
 # find the source a failure.
 
 foreach cls { "ada" "c" "c++" "d" "fortran" "go" \
-		    "optimizers" "param" "target" "warnings" } {
-
+		"common" "optimizers" "param" "target" "warnings" } {
     check_for_options c "--help=$cls" "" "^ +-.*\[^:.\]$" ""
 }