Rake: accept symbols defined with single and double quote characters

Close #3474.

A symbol defined with single and double quote characters like :'name'
and :"name" caused a crash of the Rake prser.

The original code handled the initial character, <:> of a name like
<:name> in the Rake parser side. The Rake passed the rest of string
(<name>) to rubyParseMethodName() exported from the Ruby parser.

However, rubyParseMethodName() itself has an ability to handle the initial
character. So this commit makes the Rake parser pass whole <:name> to
rubyParseMethodName(). The single and double quote characters after <:>
is handled in rubyParseMethodName().

Signed-off-by: Masatake YAMATO <yamato@redhat.com>

Units/parser-rake.r/xtasks.d/expected.tags

@@ -15,3 +15,5 @@ verify_private_key_present	input.rake	/^task :verify_private_key_present do$/;"
 build	input.rake	/^task :build => :verify_private_key_present$/;"	task
 default	input-0.rake	/^task :default => :test$/;"	task
 test	input-0.rake	/^Rake::TestTask.new 'test' do |t|$/;"	xtask	typeref:typename:Rake::TestTask.new
+spec:rcovSingle	input-1.rake	/^RSpec::Core::RakeTask.new(:'spec:rcovSingle') do |t|$/;"	xtask	typeref:typename:RSpec::Core::RakeTask.new
+spec:rcovDouble	input-1.rake	/^RSpec::Core::RakeTask.new(:"spec:rcovDouble") do |t|$/;"	xtask	typeref:typename:RSpec::Core::RakeTask.new

Units/parser-rake.r/xtasks.d/input-1.rake

@@ -0,0 +1,19 @@
+# https://raw.githubusercontent.com/apache/thrift/master/lib/rb/Rakefile
+RSpec::Core::RakeTask.new(:'spec:rcovSingle') do |t|
+  t.rspec_opts = ['--color', '--format d']
+  t.rcov = true
+  t.rcov_opts = ['--exclude', '^spec,/gems/']
+end
+
+RSpec::Core::RakeTask.new(:"spec:rcovDouble") do |t|
+  t.rspec_opts = ['--color', '--format d']
+  t.rcov = true
+  t.rcov_opts = ['--exclude', '^spec,/gems/']
+end
+
+# The next one may be extracted.
+RSpec::Core::RakeTask.new(:) do |t|
+  t.rspec_opts = ['--color', '--format d']
+  t.rcov = true
+  t.rcov_opts = ['--exclude', '^spec,/gems/']
+end

parsers/rake.c

@@ -93,7 +93,6 @@ static vString *readTask (const unsigned char **cp, bool *variable)
 		}
 		break;
 	case ':':
-		++*cp;
 		vstr = vStringNew ();
 		if (!rubyParseMethodName (cp, vstr))
 		{