Work on heap and space initialization to support image loading

Change-Id: Icab25efa4dee17e4b6c6e97e38f63f5ab8a8a005
diff --git a/src/os_linux.cc b/src/os_linux.cc
index 8f5f56a..6d84b51 100644
--- a/src/os_linux.cc
+++ b/src/os_linux.cc
@@ -30,7 +30,7 @@
 bool OS::FileExists(const char* name) {
   struct stat st;
   if (stat(name, &st) == 0) {
-    return S_ISREG(st.st_mode);  // TODO Deal with symlinks?
+    return S_ISREG(st.st_mode);  // TODO: Deal with symlinks?
   } else {
     return false;
   }