AK+Everywhere: Consolidate String::index_of() and String::find()

We had two functions for doing mostly the same thing. Combine both
of them into String::find() and use that everywhere.

Also add some tests to cover basic behavior.

1 files changed, 1 insertions, 1 deletions

diff --git a/Userland/DevTools/UserspaceEmulator/Emulator.cpp b/Userland/DevTools/UserspaceEmulator/Emulator.cpp
index ea555f152e..4933574167 100644
--- a/Userland/DevTools/UserspaceEmulator/Emulator.cpp
+++ b/Userland/DevTools/UserspaceEmulator/Emulator.cpp
@@ -278,7 +278,7 @@ String Emulator::create_backtrace_line(FlatPtr address)
     const auto* region = find_text_region(address);
     if (!region)
         return minimal;
-    auto separator_index = region->name().index_of(":");
+    auto separator_index = region->name().find(':');
     if (!separator_index.has_value())
         return minimal;