apt: funcs called with a string literal consisting of a single character

Benchmark:
- https://stackoverflow.com/questions/62058906/why-my-performance-benchmark-gives-me-wrong-results

References:
- https://clang.llvm.org/extra/clang-tidy/checks/performance/prefer-single-char-overloads.html

1 files changed, 1 insertions, 1 deletions

diff --git a/methods/mirror.cc b/methods/mirror.cc
index 6da0b4258..6fbaa40e6 100644
--- a/methods/mirror.cc
+++ b/methods/mirror.cc
@@ -334,7 +334,7 @@ std::string MirrorMethod::GetMirrorFileURI(std::string const &Message, FetchItem
 	 auto const colon = uristr.find(':');
 	 if (unlikely(colon == std::string::npos))
 	    continue;
-	 auto const plus = uristr.find("+");
+	 auto const plus = uristr.find('+');
 	 if (plus < colon)
 	 {
 	    // started as tor+mirror+http we want to get the file via tor+http