Improve missing Python modules warning

Author: screamerbg

mbed/mbed.py

@@ -874,10 +874,10 @@ def post_clone(self):
 
         if len(missing):
             warning(
-                "Detected unmet Python environment dependencies for mbed OS and tools in this program.\n"
+                "mbed OS and tools in this program require Python modules that are not installed.\n"
                 "This might prevent you from compiling your code or exporting to IDEs and other toolchains.\n"
                 "The missing Python modules are: %s\n"
-                "You can install all missing dependencies by opening a command prompt in \"%s\" and running \"pip install %s\"" % (', '.join(missing), mbed_os_path, fname))
+                "You can install all missing modules by opening a command prompt in \"%s\" and running \"pip install %s\"" % (', '.join(missing), mbed_os_path, fname))
 
 
 def formaturl(url, format="default"):