Minor typo correction of code comment

Without this, the sentence is not gramatically well-formed.
diff --git a/cli/cli_main.cpp b/cli/cli_main.cpp
index 1731640..03587d7 100644
--- a/cli/cli_main.cpp
+++ b/cli/cli_main.cpp
@@ -27,7 +27,7 @@
 
 
 /*
- * Top-level application for accessing almost of apitrace
+ * Top-level application for accessing almost all of apitrace
  * functionality.
  */