Properly expand multiple variables in the same line.

When were two or more different variables in the same line, ruleparser used to
expand the first one and replace *all* variables (since all variables are
matches of variableLine regexp) with that expanded value. The corrent way is to
replace that exact variable reference with the expanded value.

Author: modax

src/ruleparser.cpp

@@ -188,7 +188,7 @@ void Rules::load(const QString &filename)
                         qFatal("Undeclared variable: %s", qPrintable(variableLine.cap(1)));
                     }
                 }
-                line = line.replace(variableLine, replacement);
+                line = line.replace(variableLine.cap(0), replacement);
             }
             if (state == ReadingRepository) {
                 if (matchBranchLine.exactMatch(line)) {