Add function to get the start position; add some comments

src/main.cpp

@@ -19,6 +19,7 @@
 #include <string>
 #include <string_view>
 
+// Returns string with removed ANSI color codes
 std::string remove_colors(const std::string &text)
 {
     auto newtext{text};
@@ -33,6 +34,15 @@ std::string remove_colors(const std::string &text)
     return newtext;
 }
 
+// Returns the position of the 2nd + or -
+size_t get_start_pos(const std::string &line)
+{
+    auto pos{std::min(line.find('+'), line.find('-')) + 1};
+    pos = std::min(line.find('+', pos), line.find('-', pos));
+
+    return pos;
+}
+
 int main()
 {
     static constexpr std::string_view red{"\x1b[91m"};
@@ -43,19 +53,19 @@ int main()
     while (std::getline(std::cin, line))
     {
         const auto line_nc{remove_colors(line)};
+        // Don't color +++ and --- lines
         if (line_nc[2] != '+' && line_nc[2] != '-')
         {
-            auto pos{std::min(line.find('+'), line.find('-')) + 1};
-            pos = std::min(line.find('+', pos), line.find('-', pos));
-
             if (line_nc[1] == '+')
             {
+                const auto pos{get_start_pos(line)};
                 std::cout << line.substr(0, pos) << green << line.substr(pos)
                           << reset << '\n';
                 continue;
             }
             if (line_nc[1] == '-')
             {
+                const auto pos{get_start_pos(line)};
                 std::cout << line.substr(0, pos) << red << line.substr(pos)
                           << reset << '\n';
                 continue;