RTF formatter creates incomplete RTF code sequences

Hi,

I use pygments for converting code sniplets to RTF. I observed a difference between the version 2.4.2 and 2.5.1+. In the newer versions some RTF codes are missing, especially round and curly brackets are ignored.

See the following Java code line which I want to highlight:

 for ( int i = 0; i < nl.getLength(); i++ ) {

Here, the Python code:

lexer = get_lexer_by_name("java") 
formatter = RtfFormatter(style = "xcode")
print(highlight(code, lexer, formatter))

Dependent on which version I install, I get two different results:

 2.4.2:   
{\cf7 for} {\cf6 (} {\cf7 int} {\cf6 i} {\cf6 =} {\cf3 0}{\cf6 ;} {\cf6 i} {\cf6 <} {\cf6 nl}{\cf6 .}{\cf8 getLength}{\cf6 (}{\cf6 )}{\cf6 ;} {\cf6 i}{\cf6 +}{\cf6 +} {\cf6 )} {\cf6 \{}\par

and

2.5.1 and higher :  
{\cf7 for} ( {\cf7 int} {\cf6 i} {\cf6 =} {\cf3 0}; {\cf6 i} {\cf6 <} {\cf6 nl}.{\cf8 getLength}(); {\cf6 i}{\cf6 +}{\cf6 +} ) \{\par

You see the newer version lacks some RTF color codes. In comparison to current SVG and JPEG and older RTF output the first round bracket in Java's for ( has the same color than the for statement, but it must be a different one (as in version 2.4.2).

The problem concerns other styles and languages, too.

Start by reproducing the issue with the Java snippet, get_lexer_by_name("java"), and RtfFormatter(style="xcode"), comparing Pygments 2.4.2 with 2.5.1 or later. Trace how RtfFormatter emits color codes for parentheses and braces; done means punctuation retains the expected styling across the affected styles and languages.