diff --git a/Units/parser-gemspec.r/simple-gemspec.d/expected.tags b/Units/parser-gemspec.r/simple-gemspec.d/expected.tags
index a1db3cde3e..e93cbfce6d 100644
--- a/Units/parser-gemspec.r/simple-gemspec.d/expected.tags
+++ b/Units/parser-gemspec.r/simple-gemspec.d/expected.tags
@@ -4,12 +4,17 @@ rspec-support	input.gemspec	/^    s.add_runtime_dependency "rspec-support", "= #
 rspec-support	input.gemspec	/^    s.add_runtime_dependency "rspec-support", "~> #{RSpec::Core::Version::STRING.split('.')[0..1/;"	g	roles:runtimeDep
 cucumber	input.gemspec	/^  s.add_development_dependency "cucumber", "~> 1.3"$/;"	g	roles:develDep
 minitest	input.gemspec	/^  s.add_development_dependency "minitest", "~> 5.3"$/;"	g	roles:develDep
-aruba	input.gemspec	/^  s.add_development_dependency "aruba",    "~> 0.14.9"$/;"	g	roles:develDep
-coderay	input.gemspec	/^  s.add_development_dependency "coderay",  "~> 1.1.1"$/;"	g	roles:develDep
-mocha	input.gemspec	/^  s.add_development_dependency "mocha",        "~> 0.13.0"$/;"	g	roles:develDep
-rr	input.gemspec	/^  s.add_development_dependency "rr",           "~> 1.0.4"$/;"	g	roles:develDep
-flexmock	input.gemspec	/^  s.add_development_dependency "flexmock",     "~> 0.9.0"$/;"	g	roles:develDep
-thread_order	input.gemspec	/^  s.add_development_dependency "thread_order", "~> 1.1.0"$/;"	g	roles:develDep
+aruba	input.gemspec	/^  s.add_development_dependency %q{aruba},    "~> 0.14.9"$/;"	g	roles:develDep
+coderay	input.gemspec	/^  s.add_development_dependency %q[coderay],  "~> 1.1.1"$/;"	g	roles:develDep
+mocha	input.gemspec	/^  s.add_development_dependency %q(mocha),        "~> 0.13.0"$/;"	g	roles:develDep
+rr	input.gemspec	/^  s.add_development_dependency %q<rr>,           "~> 1.0.4"$/;"	g	roles:develDep
+flexmock	input.gemspec	/^  s.add_development_dependency %q flexmock ,     "~> 0.9.0"$/;"	g	roles:develDep
+thread_order	input.gemspec	/^  s.add_development_dependency %q!thread_order!, "~> 1.1.0"$/;"	g	roles:develDep
+strange{name}(just){-}<for>{-}{testing}	input.gemspec	/^  s.add_runtime_dependency %q{strange{name}(just){-}<for>{-}{testing}}.freeze, [">= 1.2.4".freez/;"	g	roles:runtimeDep
+net-ssh	input.gemspec	/^  s.add_runtime_dependency("net-ssh", ">= 1.0.1")$/;"	g	roles:runtimeDep
+ed25519	input.gemspec	/^  s.add_runtime_dependency(%q<ed25519>.freeze, [">= 1.2.4".freeze, "< 1.4".freeze])$/;"	g	roles:runtimeDep
+strange<name>just-for-testing	input.gemspec	/^  s.add_runtime_dependency(%q<strange<name>just-for-testing>.freeze, [">= 1.2.4".freeze, "< 1.4"/;"	g	roles:runtimeDep
 katello/version	input-0.gemspec	/^require "katello\/version"$/;"	L	roles:required
 katello	input-0.gemspec	/^  gem.name        = "katello"$/;"	g	roles:def
 rails	input-0.gemspec	/^  gem.add_dependency "rails"$/;"	g	roles:runtimeDep
+G1	input-1.gemspec	/^  gem.name        = %q!G1!$/;"	g	roles:def
diff --git a/Units/parser-gemspec.r/simple-gemspec.d/input-1.gemspec b/Units/parser-gemspec.r/simple-gemspec.d/input-1.gemspec
new file mode 100644
index 0000000000..236b2b28bf
--- /dev/null
+++ b/Units/parser-gemspec.r/simple-gemspec.d/input-1.gemspec
@@ -0,0 +1,4 @@
+Gem::Specification.new do |gem|
+  gem.name        = %q!G1!
+  # ...
+end
diff --git a/Units/parser-gemspec.r/simple-gemspec.d/input.gemspec b/Units/parser-gemspec.r/simple-gemspec.d/input.gemspec
index dcff51278f..ce31e21bcc 100644
--- a/Units/parser-gemspec.r/simple-gemspec.d/input.gemspec
+++ b/Units/parser-gemspec.r/simple-gemspec.d/input.gemspec
@@ -49,12 +49,17 @@ Gem::Specification.new do |s|
 
   s.add_development_dependency "cucumber", "~> 1.3"
   s.add_development_dependency "minitest", "~> 5.3"
-  s.add_development_dependency "aruba",    "~> 0.14.9"
+  s.add_development_dependency %q{aruba},    "~> 0.14.9"
 
-  s.add_development_dependency "coderay",  "~> 1.1.1"
+  s.add_development_dependency %q[coderay],  "~> 1.1.1"
 
-  s.add_development_dependency "mocha",        "~> 0.13.0"
-  s.add_development_dependency "rr",           "~> 1.0.4"
-  s.add_development_dependency "flexmock",     "~> 0.9.0"
-  s.add_development_dependency "thread_order", "~> 1.1.0"
+  s.add_development_dependency %q(mocha),        "~> 0.13.0"
+  s.add_development_dependency %q<rr>,           "~> 1.0.4"
+  s.add_development_dependency %q flexmock ,     "~> 0.9.0"
+  s.add_development_dependency %q!thread_order!, "~> 1.1.0"
+  s.add_development_dependency %qadonttagmea, "~> 1.1.0"
+  s.add_runtime_dependency %q{strange{name}(just){-}<for>{-}{testing}}.freeze, [">= 1.2.4".freeze, "< 1.4".freeze]
+  s.add_runtime_dependency("net-ssh", ">= 1.0.1")
+  s.add_runtime_dependency(%q<ed25519>.freeze, [">= 1.2.4".freeze, "< 1.4".freeze])
+  s.add_runtime_dependency(%q<strange<name>just-for-testing>.freeze, [">= 1.2.4".freeze, "< 1.4".freeze])
 end
diff --git a/parsers/gemspec.c b/parsers/gemspec.c
index 272071abc1..2ae2ad2c35 100644
--- a/parsers/gemspec.c
+++ b/parsers/gemspec.c
@@ -117,9 +117,9 @@ static int lineNotify (rubySubparser *s, const unsigned char **cp)
 		if (p)
 		{
 			rubySkipWhitespace (&p);
-			if ((!is_attr) || *p == '=')
+			if (is_attr == false || *p == '=')
 			{
-				if (is_attr)
+				if (*p == '(' || *p == '=')
 				{
 					p++;
 					rubySkipWhitespace (&p);
@@ -138,6 +138,19 @@ static int lineNotify (rubySubparser *s, const unsigned char **cp)
 					}
 					vStringDelete (gem);
 				}
+				else if (p [0] == '%')
+				{
+					vString *gem = vStringNew ();
+					p++;
+					if (rubyParsePercentString(&p, gem))
+					{
+						if (role == ROLE_DEFINITION_INDEX)
+							makeSimpleTag (gem, kind);
+						else
+							makeSimpleRefTag (gem, kind, role);
+					}
+					vStringDelete (gem);
+				}
 			}
 		}
 	}
diff --git a/parsers/ruby.c b/parsers/ruby.c
index 56b44599ec..949c597de3 100644
--- a/parsers/ruby.c
+++ b/parsers/ruby.c
@@ -410,6 +410,7 @@ extern bool rubySkipWhitespace (const unsigned char** cp)
 	return r;
 }
 
+/* TODO: handle double quote if boundary == '"' */
 static void parseString (const unsigned char** cp, unsigned char boundary, vString* vstr)
 {
 	while (**cp != 0 && **cp != boundary)
@@ -431,6 +432,77 @@ extern bool rubyParseString (const unsigned char** cp, unsigned char boundary, v
 	return (p != *cp);
 }
 
+static bool rubyParsePercent_q (const unsigned char** cp, vString* vstr)
+{
+	const unsigned char *p = *cp;
+	bool recursive;
+	unsigned char boundary[2];
+
+	if (*p == '\0' || isalnum (*p))
+		return false;
+
+	boundary[0] = *p;
+	boundary[1] = *p;
+	recursive = false;
+	switch (*p)
+	{
+	case '{':
+		boundary[1] = '}';
+		recursive = true;
+		break;
+	case '[':
+		boundary[1] = ']';
+		recursive = true;
+		break;
+	case '(':
+		boundary[1] = ')';
+		recursive = true;
+		break;
+	case '<':
+		boundary[1] = '>';
+		recursive = true;
+		break;
+	}
+	p++;
+
+	unsigned int depth = 1;
+	while (*p != '\0')
+	{
+		if (*p == boundary[1])
+		{
+			depth--;
+			if (depth == 0)
+			{
+				*cp = p;
+				return true;
+			}
+		}
+		else if (recursive && boundary[0] == *p)
+			depth++;
+		vStringPut (vstr, *p);
+		p++;
+	}
+	return false;
+}
+
+extern bool rubyParsePercentString (const unsigned char** cp, vString* vstr)
+{
+	const unsigned char *p = *cp;
+
+	switch (*p)
+	{
+	case 'q':
+		++p;
+		if (rubyParsePercent_q(&p, vstr))
+		{
+			*cp = p;
+			return true;
+		}
+		break;
+	}
+	return false;
+}
+
 /* If the current scope is A.B, and the name is B.C, B is overlapped.
  * In that case, the function returns true. Else false.
  */
diff --git a/parsers/x-ruby.h b/parsers/x-ruby.h
index 231ebbfc0a..9767cb21d9 100644
--- a/parsers/x-ruby.h
+++ b/parsers/x-ruby.h
@@ -37,6 +37,7 @@ extern bool rubyCanMatchKeyword (const unsigned char** s, const char* literal);
 extern bool rubyCanMatchKeywordWithAssign (const unsigned char** s, const char* literal);
 
 extern bool rubyParseString (const unsigned char** cp, unsigned char boundary, vString* vstr);
+extern bool rubyParsePercentString (const unsigned char** cp, vString* vstr);
 extern bool rubyParseMethodName (const unsigned char **cp, vString* vstr);
 extern bool rubyParseModuleName (const unsigned char **cp, vString* vstr);