#619 Patch for groovy mode

[Egor Abramovich]

Problem:
Triple quoted strings with HTML markup inside are breaking highlighting.
For example, the following code will be highlighted incorrectly:

def aMultilineString = """
Example
"""
println aMultilineString

Fix:
Triple-quotes literals should be added to "groovy.xml":

<SPAN TYPE="LITERAL1" DELEGATE="LITERAL">
<BEGIN>"""</BEGIN>
<END>"""</END>
</SPAN>

<SPAN TYPE="LITERAL1">
<BEGIN>'''</BEGIN>
<END>'''</END>
</SPAN>

[Egor Abramovich]

Let me put code example again:

def aMultilineString = """
<a href="http://example.com">Example</a>
"""
println aMultilineString

[Jean-Francois LARVOIRE]

I agree with this patch. It's sorely needed!