AK: Add StringBuilder::append_repeated(StringView, size_t)

By analogy with append_repeated(char, size_t)

AK/StringBuilder.cpp

@@ -105,6 +105,16 @@ ErrorOr<void> StringBuilder::try_append_repeated(char ch, size_t n)
     return {};
 }
 
+ErrorOr<void> StringBuilder::try_append_repeated(StringView string, size_t n)
+{
+    if (string.is_empty())
+        return {};
+    TRY(will_append(string.length() * n));
+    for (size_t i = 0; i < n; ++i)
+        TRY(try_append(string));
+    return {};
+}
+
 void StringBuilder::append(StringView string)
 {
     MUST(try_append(string));
@@ -130,6 +140,11 @@ void StringBuilder::append_repeated(char ch, size_t n)
     MUST(try_append_repeated(ch, n));
 }
 
+void StringBuilder::append_repeated(StringView string, size_t n)
+{
+    MUST(try_append_repeated(string, n));
+}
+
 ErrorOr<ByteBuffer> StringBuilder::to_byte_buffer() const
 {
     return ByteBuffer::copy(data(), length());

AK/StringBuilder.h

@@ -39,6 +39,7 @@ public:
     }
     ErrorOr<void> try_append(char const*, size_t);
     ErrorOr<void> try_append_repeated(char, size_t);
+    ErrorOr<void> try_append_repeated(StringView, size_t);
     ErrorOr<void> try_append_escaped_for_json(StringView);
 
     void append(StringView);
@@ -49,6 +50,7 @@ public:
     void append(char const*, size_t);
     void appendvf(char const*, va_list);
     void append_repeated(char, size_t);
+    void append_repeated(StringView, size_t);
 
     void append_as_lowercase(char);
     void append_escaped_for_json(StringView);