Fix missing space in docs.

Change-Id: I160ae95517f12aae96b35f690012e228a5e12acb
diff --git a/docs/data-sources/native-heap-profiler.md b/docs/data-sources/native-heap-profiler.md
index dc81a15..02ec07c 100644
--- a/docs/data-sources/native-heap-profiler.md
+++ b/docs/data-sources/native-heap-profiler.md
@@ -277,7 +277,7 @@
 4. basename of library file relative to binary path, but with base.apk!
     removed from filename.
 5. in the subdirectory .build-id: the first two hex digits of the build-id
-    as subdirectory, then the rest of the hex digits, with ".debug"appended.
+    as subdirectory, then the rest of the hex digits, with ".debug" appended.
     See
     https://fedoraproject.org/wiki/RolandMcGrath/BuildID#Find_files_by_build_ID