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/Libraries/LibELF/Image.cpp b/Userland/Libraries/LibELF/Image.cpp
index b9bde0e15f..820996c72a 100644
--- a/Userland/Libraries/LibELF/Image.cpp
+++ b/Userland/Libraries/LibELF/Image.cpp
@@ -297,7 +297,7 @@ Optional<Image::Symbol> Image::find_demangled_function(const String& name) const
         if (symbol.is_undefined())
             return IterationDecision::Continue;
         auto demangled = demangle(symbol.name());
-        auto index_of_paren = demangled.index_of("(");
+        auto index_of_paren = demangled.find('(');
         if (index_of_paren.has_value()) {
             demangled = demangled.substring(0, index_of_paren.value());
         }