add missing link [skip ci]

docs/markdown/Reference-manual.md

@@ -131,7 +131,7 @@ This function creates a new top-level target. Like all top-level targets, this
 integrates with the selected backend. For instance, with Ninja you can
 run it as `ninja target_name`. This is a dummy target that does not execute any
 command, but ensures that all dependencies are built. Dependencies can be any
-build target (e.g. return value of executable(), custom_target(), etc)
+build target (e.g. return value of [executable()](#executable), custom_target(), etc)
 
 ### assert()
 
@@ -2254,7 +2254,7 @@ and has the following methods:
 
 - `path()` which returns a string pointing to the script or executable
   **NOTE:** You should not need to use this method. Passing the object
-  itself should work in all cases. F.ex.: `run_command(obj, arg1, arg2)`
+  itself should work in all cases. For example: `run_command(obj, arg1, arg2)`
 
 ### `environment` object