c++ style

src/text/text_line.cpp

@@ -64,7 +64,7 @@ void text_line::add_glyph(glyph_info && glyph, double scale_factor_)
         // Only add character spacing if the character is not a zero-width part of a cluster.
         width_ += advance + glyphs_.back().format->character_spacing  * scale_factor_;
         glyphs_width_ += advance;
-        space_count_++;
+        ++space_count_;
     }
     glyphs_.emplace_back(std::move(glyph));
 }