*: let libfmt quote strings

src/lib/ffmpeg/Filter.cxx

@@ -17,7 +17,7 @@ RequireFilterByName(const char *name)
 {
 	const auto *filter = avfilter_get_by_name(name);
 	if (filter == nullptr)
-		throw FmtRuntimeError("No such FFmpeg filter: '{}'", name);
+		throw FmtRuntimeError("No such FFmpeg filter: {:?}", name);
 
 	return *filter;
 }

src/lib/icu/Converter.cxx

@@ -41,7 +41,7 @@ IcuConverter::Create(const char *charset)
 	UConverter *converter = ucnv_open(charset, &code);
 	if (converter == nullptr)
 		throw ICU::MakeError(code,
-				     FmtBuffer<256>(FMT_STRING("Failed to initialize charset '{}'"),
+				     FmtBuffer<256>(FMT_STRING("Failed to initialize charset {:?}"),
 						    charset));
 
 	return std::unique_ptr<IcuConverter>(new IcuConverter(converter));
@@ -54,7 +54,7 @@ IcuConverter::Create(const char *charset)
 			iconv_close(to);
 		if (from != (iconv_t)-1)
 			iconv_close(from);
-		throw FmtErrno(e, FMT_STRING("Failed to initialize charset '{}'"),
+		throw FmtErrno(e, FMT_STRING("Failed to initialize charset {:?}"),
 			       charset);
 	}
 

src/lib/sqlite/Database.cxx

@@ -12,7 +12,7 @@ Database::Database(const char *path)
 	int result = sqlite3_open(path, &db);
 	if (result != SQLITE_OK)
 		throw SqliteError(db, result,
-				  FmtBuffer<1024>("Failed to open sqlite database '{}'",
+				  FmtBuffer<1024>("Failed to open sqlite database {:?}",
 						  path));
 }