fix cutting lines not ending with \n

text.c

@@ -530,8 +530,18 @@ int textViewer(char *file) {
 						char line[MAX_LINE_CHARACTERS];
 						int length = textReadLine(buffer, line_start, size, line);
 
+						CopyEntry *entry = &copy_buffer[copy_current_size];
+
 						// Copy line into copy_buffer
-						memcpy(copy_buffer[copy_current_size].line, &buffer[line_start], length);
+						memcpy(entry->line, &buffer[line_start], length);
+
+						// Make sure line end with a newline
+						if (entry->line[length - 1] != '\n') {
+							entry->line[length] = '\n';
+							length++;
+						}
+
+						// Terminate line
 						copy_buffer[copy_current_size].line[length] = '\0';
 
 						// Remove line