Fixing error in include documentation

When I run the example I get the following error. The error goes away when I remove the "`" character.

/usr/local/lib/node_modules/preprocessor/Preprocessor.js:195
                        throw(new Error("Illegal #"+match[2]+": "+this.source.
                              ^
Error: Illegal #include: // #include "include.js"`

...
    at Preprocessor.process (/usr/local/lib/node_modules/preprocessor/Preprocessor.js:195:31)