Docs table regex (#53)

* Add more specific info about regex

* noop change to trigger checks

bin/pt-table-checksum

@@ -11,6 +11,7 @@ use warnings FATAL => 'all';
 # in this file.  Setting %INC to this file for each module makes Perl aware
 # of this so it will not try to load the module from @INC.  See the tool's
 # documentation for a full list of dependencies.
+
 BEGIN {
    $INC{$_} = __FILE__ for map { (my $pkg = "$_.pm") =~ s!::!/!g; $pkg } (qw(
       Percona::Toolkit
@@ -12248,7 +12249,9 @@ Only checksum this comma-separated list of databases.
 
 type: string; group: Filter
 
-Only checksum databases whose names match this Perl regex.
+Only checksum databases whose names match this Perl regex. This is matched
+against the lowercase table name. This is the bare regex; it should not be
+enclosed in slashes.
 
 =item --defaults-file
 
@@ -12370,7 +12373,9 @@ the database name.  The L<"--replicate"> table is always automatically ignored.
 
 type: string; group: Filter
 
-Ignore tables whose names match the Perl regex.
+Ignore tables whose names match the Perl regex. This is matched
+against the lowercase table name. This is the bare regex; it should not be
+enclosed in slashes.
 
 =item --max-lag
 

util/build-packages

@@ -388,7 +388,7 @@ build_deb() {
 
    cd $RELEASE_DIR
    if [ ! -f "$PKG.tar.gz" ]; then
-      die "Cannot build RPM because $PKG.tar.gz does not exist"
+      die "Cannot build deb because $PKG.tar.gz does not exist"
    fi
 
    # Copy debian pkg files.