diff --git a/git/config.py b/git/config.py
@@ -496,18 +496,26 @@ def string_decode(v: str) -> str:
                if mo:
                    # We might just have handled the last line, which could contain a quotation we want to remove.
                    optname, vi, optval = mo.group("option", "vi", "value")
                    if vi in ("=", ":") and ";" in optval and not optval.strip().startswith('"'):
                        pos = optval.find(";")
                        if pos != -1 and optval[pos - 1].isspace():
                            optval = optval[:pos]
                    optval = optval.strip()
-                    optname = self.optionxform(optname.rstrip())
-                    if len(optval) > 1 and optval[0] == '"' and optval[-1] != '"':
                        is_multi_line = True
                        optval = string_decode(optval[1:])
-                    elif len(optval) > 1 and optval[0] == '"' and optval[-1] == '"':
                        optval = optval[1:-1]
-                    # END handle multi-line
                    # Preserves multiple values for duplicate optnames.
                    cursect.add(optname, optval)
                else:

diff --git a/test/fixtures/git_config_with_quotes_escapes b/test/fixtures/git_config_with_quotes_escapes
@@ -0,0 +1,9 @@